Introduction

The Yardmax Two-Stage Snow Blower YB6770 is a powerful and efficient machine designed to tackle heavy snowfall with ease. Featuring a 26-inch clearing width and a robust 208cc engine, it can handle snow depths of over a foot. The snow blower includes convenient features such as a dashboard with a headlight, heated hand grips, and a self-propelled drive with multiple speed settings. Priced at approximately $649, it combines performance and user comfort for effective snow removal.

UNPACKING THE CONTAINER

Use scissors or a knife to cut all the straps. Lift off the carton and dispose of properly. (See Fisure 1)

CONTENTS SUPPLIED

Your YARDMAX snow blower comes partially assembled and contains the following:

Main Machine
Discharge Chute
Chute Crank Flange
Lower Handle
Handlebars
Shift Arm
Skid Shoes
Shift Rod
Directional Chute Control
Operator's Manual & Engine Manual
Tools for Spark Plug Assembly
Engine Oil
Plastic Skid Shoes (Optional)
Drift Cutters (Optional)
Hardware Kit, Including:

Specifications

Model Number: YB6770
Clearing Width: 26"
Engine: LCT
Displacement: 208cc
Start Type: Electric
Auger Diameter: 12"
Impeller Diameter: 12"
Chute Control: Directional Chute Control
Chute Type: Steel
Intake Depth: 21"
Speed: 13" x 4"
Forward Speeds: 6
Reverse Speeds: 2
Control Dashboard: Included
Headlight: Included
Cup Holder: Included
Heated Hand Grips: Included

Yardmax Two-Stage Snow Blower YB6770 PARTS DIAGRAM

MAIN MACHINE

HANDLEBARS

GEARBOX

PARTS LIST

No.	Description	Qty
1	Oil Seal M10x1	1
2	Spiral Assembly-Right	6
3	FT Bolt M6x20	16
4	Spring Washer 6	17
5	Flat Washer 6	2
6	Seal B20x35x7	7
7	Screw M5x10	2
8	Auger Gearcase Housing-Right	2
9	Auger Shaft	2
10	Clevis Pin 1.8	2
11	Worm Wheel	1
12	Shaft Sleeve	1
13	Auger Gearcase Housing-Left	2
14	Washer	1
15	Spiral Assembly-Left	5
16	Bearing Box	13
17	Screw ST8x16	1
18	Big Washer	9
19	Shear Pin	2
20	Half Round Key 5x7.5×19	7
21	Ball Bearing 6001-2RS	2
22	Roll Pin 6x37	7
23	Impeller Shaft	2
24	Washer	7
25	Seal B20x35x7	2
26	Ball Bearing 61904-2RS	1
27	Thrust Bearing 51104	1
28	Impeller Assembly	1
29	Bolt M8x16	2
30	Flat Washer 8	3
31	Shave Plate	1
32	Lock Nut M8	1
33	Bolt M8x20	4
34	Skid Shoe (Metal)	1
35	Hex. Flange Nut M8	12
36	Bolt M8x25	1
37	Plug	5
38	Auger Housing Assy.	3
39	Screw ST5.5x13	1
40	Chute Clean-Out Tool	1
41	Clean-Out Tool Mounting Bracket	1
42	Discharge Chute Ring	6
43	Discharge Chute	3
44	FT Bolt M6x30	13
45	Chute Flange Keeper	2
46	Flange Lock Nut M6	1
47	Screw M5x6	1
48	Discharge Chute Washer	1
49	Ball Bearing 6203-2RS	1
50	Bearing Housing	1
51	Auger Pulley	1
52	Big Flat Washer 8	1
53	Auger Belt	2
54	Spring Washer 8	3
55	Bolt M8x25	1
56	Chute Crank Bracket	4
57	Bushing	1
58	Flat Washer 6	1
59	FT Bolt M6x25	8
60	Handle Knob Assembly	1
61	Lock Washer	1
62	Bolt M8x35	4
63	Bolt M8x20	1
64	Chute Linkage Plate	1
65	Wheel	4
66	Flat Washer 8	12
67	Auger Idler	1
68	Spacer	1
69	FT Bolt M8x35	4
70	Pivot Bolt	1
71	Screw M8x16	1
72	Auger Idler Bracket	1
73	Extension Spring	1
74	Auger Idler Mounting Bracket	1
75	Chute Adjustable Cable	1
76	Big Gear	1
77	Pin A6x35	1
78	Frame Cover	1
79	Gearbox Main Frame	1
80	Wheel Shaft	1
81	Shaft Bushing	2
82	Shaft Spacer	2
83	Washer	3
84	Lock Pin 8	2
85	Wheel	2
86	Pin 6x36	1
87	Auger Cable Holder	2
88	Shift Arm	8
89	FT Bolt M6x10	2
90	Friction Wheel Side Plate	1
91	Rubber Ring	3
92	Snap Ring 15	2
93	Ball Bearing 60203-2RSN	1
94	Friction Wheel Hub	1
95	Clevis Pin 2	1
96	Pin 6x25	1
97	Sleeve	1
98	Gear Shifting Lever	1
99	Spin Axis	1
100	Screw M6x16	1
101	Fork Bracket	1
102	Fork Assembly	1
103	Circlip 35	10
104	Hex Shaft	1
105	Circlip 40	1
106	Cable Support Bracket	1
107	Cable Roller	2
108	Roller Bushing	1
109	Driven Pulley Bracket	1
110	Friction Wheel Retaining Spring	1
111	Flange Lock Nut M16	2
112	Locating Knot	1
113	Locating Shaft	1
114	Lock Nut M10	1
115	Engine Belt Cover	1
116	Driven Pulley Hub	1
117	Ball Bearing 6006-2RS	1
118	Engine Pulley	1
119	Drive Belt	1
120	Key 6X6X45	2
121	Spring Washer 10	1
122	Washer	1
123	Belt Pulley	2
124	Drive Clutch Idler	1
125	Bushing	1
126	Bolt 5/16-24unf	4
127	Drive Clutch Idler Bracket	1
128	FT Bolt M8x35	1
129	Spacer	1
130	Engine	7
131	Bolt 5/16-24unf	1
132	Belt Blocker	1
133	Belt Idler Pulley	1
134	Friction Wheel Assembly	1
135	Speed Changer Hub	1
136	Snap Ring 15	1
137	Driven Pulley	1
138	Gearshift Lever	1
139	Snap Ring	1
140	Screw	1

No.	Description	Qty
141	Screw M5×12	1
142	Retainer Spring	1
143	FT Bolt M10x60	1
144	Dashboard	1
145	Cupped Cover	1
146	Bolt M8x16	1
147	Headlight	1
148	Screw ST4.8*16	1
149	Light Holder	1
150	LED Light Shock Absorber	1
151	Heating Handle	1
152	Rivet 4x16	1
153	Auger Clutch Lever	1
154	Lever Mounting Bracket	1
155	Pin 3x20	1
156	Dashboard Mounting Bracket	1
157	Operation Handlebar-Left	1
158	Bolt M8x45	1
159	Directional Chute Control Lever Knob	1
160	Circlip 10	1
161	Directional Chute Control Lever	1
162	Chute Bracket	1
163	Rubber Spacer	1
164	Washer 10	1
165	Interlock Cam	1
166	Lock Plate-Left	1
167	Washer 10	1
168	Lower Handle	1
169	Arc Washer 8	1
170	FT Bolt M10x20	1
171	FT Bolt M10x40	1
172	Arc Washer 10	1
173	Lock Plate-Right	1
174	Furniture Screws	1
175	Plastic Bushing	1
176	Flange Bolt M8x70	1
177	Bolt M6x40	1
178	Friction Wheel Cable	1
179	Stop Block	1
180	Screw ST6.3x16	3
181	Drive Clutch Lever	1
182	Drive Clutch Lever Retaining Spring	1
183	Operation Handlebar-Right	1
184	Heating Handle	1
185	FT Bolt M5x12	1
186	Switch	1
187	Operation Handles Connector	2
188	Interlock Spring	1
189	Interlock Rod	2
190	Thick Lock Nut M5	2
191	FT Bolt M5x12	3
192	Thick Lock Nut M6	1
193	Thick Lock Nut M8	1
194	Screw M8x16	1

OPTIONAL DRIFT CUTTERS

No.	Description	Qty
1	Handle Knob Assembly	4
2	Bolt M8x20	4
3	Drift Cutter	2

OPTIONAL SKID SHOES

No.	Description	Qty
4	Plastic Skid Shoe	2

Description

The Yardmax YB6770 features a two-stage design, which includes an auger and an impeller, ensuring efficient snow removal. The auger breaks down the snow, and the impeller propels it through the discharge chute. The snow blower is equipped with a robust steel auger and a high-capacity impeller, allowing it to handle deep snow with ease. Additionally, it comes with adjustable chute control and a variable speed transmission, providing users with greater control over their snow-clearing tasks.

ASSEMBLY

This snow blower was partially assembled at the factory. To assemble your machine follow the below instructions.

HANDLEBARS

Unscrew the cable nut, slide the cable into the cable holder and tighten the nut. Loosen the two bolts on the sides of the transmission housing.
Slide the lower handle slots in-between the transmission and the washer. Finger tighten the bolts to hold the handle in place.
Align the holes in the lower handle with the upper holes on both sides of the transmission housing. Insert the bolts and curved washers and finger tighten to hold in place. (See Figure 2a)
Keep the lower handle level and tighten two bolts from the previous steps.
Raise the upper handlebars into operation position and slide the three bolts and washers through the two holes on the right side of the handlebar and the left lower hole. Secure them by finger tightening the nuts. Leave the upper hole on the left hand side without a bolt. This will be used to secure the directional chute control assembly later. (See Figure 2b)
Ensure the handlebars are level and tighten all three nuts.

SKID SHOES

Place the machine is on a level and solid surface.
Lift the machine so that the scrapper blade is 1/8" (3mm) above the ground, ensuring it is level. A piece of cardboard half the thickness of the snow blower packaging placed under the scrapper blade is recommended.
Attach the skid shoes to the sides of auger housing with the bolts and nuts. The shorter M8X20 bolts should be in the front holes while the longer M8X25 bolts in the rear holes. Move the skid shoes down as far as possible. Be sure both skid shoes are adjusted evenly. Tighten securely. (See Figure 3)
Remove the 1/8" (3mm) spacer you used from under the scrapper blade.

DISCHARGE CHUTE

Sit the chute crank flange on top of the impeller housing.
Make sure the stop triangle points forward so that the notched edge is on the left side and the pre-greased surface is on the bottom. (See Figure 4a)
Place the discharge chute facing it forward over the chute crank flange. (See Figure 4b)
Secure the three flange keepers to the bottom of the chute crank flange by sliding the bolts through the chute base holes, sliding the keepers up from the bottom, then securing them with the included nuts. (See Figure 4c)

DIRECTIONAL CHUTE CONTROL

Slide the spiral end of the directional chute control lever into the chute bracket.
Attach the directional chute control lever to the handlebar through the upper hole on the left handle by sliding the bolt thru the hole. Use the curved washer and nut to secure it to the handlebar. Leave it finger tight for easier alignment later.
Secure the spiral end on the chute bracket by sliding on the flat washer and clevis pin. (See Figure 5a)
Make sure the spiral at the bottom is fully engaging with the chute crank flange and tighten the two bolts on the chute bracket. (See Figure 5b)
Tighten the nut which secures the directional chute control on the handlebar.

SPEED SHIFT LINKAGE

Place the shift arm on shift yoke. Make sure the linkage plate points to the right. Line up the holes in the shift arm and shift yoke. Insert a roll pin through the hole. (See Figure 6a)
Insert the shift rod with a flat washer into the shift arm. Secure with the other flat washer and clevis pin. (See Figure 6b)
Lift up the shift rod. Insert the trunnion into the shift rod hole on the bottom of the shift lever under the dashboard. Install the washer and MB nut. Tighten securely. (See Figure 6c)

HEADLIGHT WIRE CONNECTION

To connect the headlight harness cut the zip tie holding the wire off the engine, plug into the wire clip connected to the LED light, use zip ties inside the manual bag to secure it to the handlebar to avoid it being snagged during use. Cut excess strip off the zip ties when secure. (See Figure 7)

TIRES

The tires are over-inflated at factory for shipping purposes. Check the pressure in the tires prior to usage. Reduce or increase air pressure to ensure equal tire pressure to the manufacturer's recommended pressure. The recommended air pressure can be found on the tire sidewall.

WARNING: Under any circumstance do not exceed manufacturer's recommended pressure. Excessive pressure when seating beads may cause tire/rim assembly to burst with force sufficient to cause serious injury. Refer to side wall of tire for recommended pressure.

WARNING: Equal tire pressure should be maintained at all times. If the tire pressure is not equal in both tires, the machine may not travel in a straight path and the scraper blade may wear unevenly.

WARNING: Keep tires free of gasoline and oil, which can harm rubber.

KNOW YOUR MACHINE

FEATURES AND CONTROLS

SPEED SHIFT LEVER

The speed shift lever has 8 positions: 6 forward speeds and 2 reverse. To change speeds, move the speed shift lever to the desired position. The lever locks in a notch at each speed selection.
WARNING: Always release the drive dutch lever before changing speeds. Failure to do so will result in damage to the snowblower.
For easier snow removal, we recommend slower speeds when removing heavier snow. Faster speeds are better for when removing lighter snow and transporting the snow blower. It is recommended that you use a slower speed until you are familiar with the operation of the snow blower.
WARNING: If the engine slows down under a load or the wheels Lil slip, shift the machine into a lower gear.
WARNING: If the front of the machine rides up, shift the machine into a lower gear. If the front continues to ride up, Iit up on the handles.

DIRECTIONAL CHUTE CONTROL

Rotate the directional chute control clockwise to move the discharge chute to the left; counterclockwise to move the chute to the right.

CHUTE DEFLECTOR

To adjust the placement and angle of the snow discharge loosen the wingnut on the side of the deflector chute, move the handle forward to place the snow low andnear the machine, pull the handle back to throw the snow further up and away from the machine. Retighten the wingnut to ensure the deflector remains where you would like it.

DRIVE CLUTCH LEVER

Squeeze the clutch lever against the handgrip to engage the transmission. Release to disengage.

WARNING: Always release the drive dutch lever before changing speeds. Failure to do so will result in damage to the snowblower.

AUGER CLUTCH LEVER

Squeeze the clutch lever against the handgrip to engage the auger and start snow blowing. Release to disengage.
When both auger clutch lever and drive clutch lever are engaged, the drive clutch lever will lock the auger clutch lever inthe engaged position. This allows you to release your left hand from the handle and adjust the discharge chute direction without interrupting the snow blowing process.

SCRAPER BLADE &SKID SHOES

The scraper blade allows better contact with the surface being cleared. It also prevents damage to the housing from normal use.
The skid shoes are located on each side of the auger housing and control the distance between the scraper blade and the ground. Adjust skid shoes equally to keep the scraper blade level with the ground.
The scraper blade & skid shoes are subject to wear and damage. Both scraper blade and skid shoes are adjustable to compensate for wear. They should be checked and adjusted periodically. Replace when necessary.
Both scraper blade and skid shoes have two wear edges. When one side wears out, they can be rotated 180° to use the other edge.

WARNING: Damage to auger housing will result if scraper blade Lil wears down too far.

SHEAR PINS

The augers are secured to the auger shaft with shear pins and clevis pins. If the auger should strike a foreign object or ice jam, the snow blower is designed so that the pins may shear, preventing damage to any other components. If augers will not turn, check to see if the pins have sheared. Replace the shear pins if necessary.

WARNING: Do not substitute. Use only original equipment shear pins as supplied with your snow blower.

AUGER

When engaged, the augers rotate and pull snow into the auger housing.

DISCHARGE CHUTE

Snow drawn into the auger housing is discharged out the discharge chute.

CHUTE CLEAN-OUT TOOL

WARNING: Never use your hands to clear a clogged discharge chute . Shut off engine and remain behind handles until all moving parts have stopped before unclogging.

The chute clean-out tool is conveniently fastened to the rear of the auger housing with a mounting clip. Should snow and ice become lodged in the discharge chute during operation, proceed as follows to safely clean the discharge chute and chute opening:

Release the auger clutch lever and shut off the engine.
Remove the clean-out tool from the clip which secures it to the rear of the auger housing.
Grasp the tool firmly by the handle and push and twist the tool into the discharge chute to dislodge the blockage.
Refasten the clean-out tool to the mounting clip on the rear of the auger housing.
Make sure the discharge chute is pointed in a safe direction (no vehicles, buildings, people, or other objects are in the direction of discharge). Restart the engine. While standing in the operator's position (behind the snow blower), engage the auger control for a few seconds to clear any remaining snow and ice from the auger housing and the discharge chute.

HEADLIGHT

The headlight provides added safety in low-visibility conditions. Turn the headlight switch to the ON position to activate.

HEATED GRIPS

To activate the heated grips, move the switch into ON position.

WARNING: It is recommended that you wear gloves when using the heated grip. If the heated grip becomes too hot, turn it off.

FUEL SHUTOFF VALVE

Always operate the snow blower with the fuel shut-off valve in the OPEN position. Close the valve when you do not use the machine.

CHOKE CONTROL

The choke control is used to choke the carburetor and assist in starting the engine. The choke control switches between the CHOKE CLOSED and CHOKE OPEN I I positions.

WARNING: Never use choke to stop engine.

PRIMER
Press the primer to pump additional fuel from the carburetor to the cylinder for improved cold weather starting.
RECOIL STARTER HANDLE
The handle is used to start the engine.
SAFETY IGNITION SWITCH
Insert the safety ignition key for engine to start and run. To stop the engine, remove the key.
RUN/STOP SWITCH
Used to stop the engine. Move switch to STOP position to stop engine. Place switch in RUN position for engine to start and run.
ELECTRIC STARTER & START BUTTON
The electric starter will start a properly choked and primed engine when start button (120V AC) is pushed. To start the machine, connect the electric starter to an electric power source with an approved extension cord and press the start button.

WARNING

Thoroughly inspect the electrical cord before using the machine. If the cord is damaged, do not operate the machine. Replace or repair the damaged cord immediately.
Connect extension cord to the electric starter plug-in frrst and then to a power outlet; disconnect the extension cord from the power outlet frrst and then from the machine.
To prevent damaging the electric starter, do not run it more than 5 continuous seconds each time you try to start. Wait 10 seconds between each attempt.

ADJUSTMENT

SKID SHOES

Position the skid shoes based on surface conditions. For removal of snow in normal conditions, such as a paved driveway or sidewalk, place skid shoes in the higher position to give a 1/8" (3mm) clearance between the scraper blade and the ground. Use a middle or lower position when the area to be cleared is uneven.
WARNING: It is not recommended to operate the snow blower on gravel as it can easily pick up and throw by the impeller, causing personal injury or damage to the snow thrower ond surrounding property.
If you choose to operate the snow thrower on a gravel surface, use extra caution and keep the skid shoes in position for maximum clearance between the ground and the scraper blade.
WARNING: Always adjust skid shoes after adjusting scraper blade to prevent premature wear to scraper blade or damage to auger housing.

To adjust the skid shoes:

Loosen the four hex nuts (two on each side) and carriage bolts. Move skid shoes to desired position.
Make sure the entire bottom surface of skid shoe is against the ground to avoid uneven wear on the skid shoes.
Retighten nuts and bolts securely.

AUGER CLUTCH AND DRIVE CLUTCH

When a uger clutch lever or drive clutch lever is released and in the disengaged position, the cable shou Id have very little slack.
Auger must stop within 5 seconds when the auger clutch lever is released. If auger clutch does not engage or disengage properly, adjust auger dutch before operation.
If the snow blower's drive is disengaging intermittently during operation, or it drives when you release the drive clutch lever, adjust the drive clutch before operation.
Both auger clutch and drive clutch can be adjusted at either end of their control cables.

Loosen adjusting nuts on cable support bracket
Slide the control cable up or down by threading adjusting nuts to increase cable tension or provide more slack.
Tighten nuts after proper adjustment is achieved ..

CHUTE BRACKET

If the spiral at the bottom of the directional chute control lever is not fully engaging with the chute assembly, the chute bracket must be adjusted.

To do so:

Loose the two nuts which secure the chute bracket and reposition it slightly.
Retighten the nuts.

PLASTIC SKID SHOES(OPTIONAL)

Optional reversible poly skid shoes protect decorative surface.

DRIFT CUTTERS (OPTIONAL)

Drift cutters break up snow drifts that are taller than the auger housing and direct the snow into the auger. Store the drift cutters on the auger housing when not in use. Reposition drift cutters so they face forward as shown. Wing nuts should be fastened on the outside of the auger housing.

OPERATION

FREEWHEELING AND SELF-PROPELLING

Left wheel equipped with the axle lock pin can be completely released by removing the pin and installing it in the outer axle hole. Unlock the left wheel to allow for easier turning of the unit.
To unlock the left wheel, remove the pin from the inner hole and insert the axle pin through the outer axle hole, but not through the wheel hub.
To lock the left wheel, insert the pin through the wheel hub and the inner axle hole.

STARTING AND STOPPING THE ENGINE

WARNING: Before starting the engine, check engine oil level and ensure the engine is served as described in the Engine Manual with the snow blower.

COLD START ELECTRIC STARTER (120V AC)
The engine is equipped with 120V A.C. electric starter and a recoil starter. The electric starter is equipped with a three-wire power cord and plug and is designed to operate at the voltage shown in the label.

WARNING: Do not use the electric starter if your household voltage different from the one shown on the electric starter.

Insert safety ignition key into ignition slot until it clicks. Do not turn the key.
Be sure fuel shutoff valve is in the OPEN position.
Move choke control to CLOSED position.
Push the primer 2 or 3 times. When temperature is below 15°F (-25°C), additional priming may be needed. When temperature is above S0°F (10°C), priming is not necessary.
Over priming may cause flooding, preventing the engine from starting. If you do flood the engine, wait a few minutes before attempting to start and do not push the primer.
Some snow engine are not equipped with primer as priming is not needed.
Connect the extension cord to the engine.
Plug the other end of the extension cord into a three-wire grounded receptacle.
Push starter button until engine starts.
WARNING: To prevent damaging the electric GB starter, do not run it more than 5 continuous seconds each time you try to start. Wait 10 seconds between each attempt.
When the engine starts, release the starter button and slowly move the choke control to the OPEN I VI position.
Disconnect the extension cord from thereceptacle first, then from the engine.

CO LD START - RECOIL STARTER

Be sure fuel shutoff valve is in the OPEN position.
Place RUN / STOP switch in RUN position.
Rotate choke control to CLOSED position.
Push the primer 2 or 3 times. When temperature is below 15°F (-25°C), additional priming may be needed. When temperature is above S0°F (10°C), priming is not necessary.
WARNING: Over priming may cause flooding, preventing the engine from starting. If you do flood the engine, wait a few minutes before attempting to start and do not push the primer.
Grasp recoil starter handle and pull rope out slowly until it pulls harder. Let rope rewind slowly.
Pull rope with a rapid continuous full arm stroke. Do not allow starter rope to snap back.
Repeat steps 5 and 6 until engine starts.
When the engine starts, release the recoil starter handle and slowly move the choke control to the OPEN I I position.

WARM START
Follow the steps above, keeping the choke control in the OPEN I I position and do not use primer.

Allow the engine to warm up for a few minutes, engine will not develop full power until it has reached normal operating temperature.
In snowy and cold conditions, some controls and moving parts may freeze. Do not use excessive force when trying to operate frozen controls. If you have difficulty operating any control or part, start the engine and let is run for a few minutes.

SNOW BLOWING TIPS
It is easier and more efficient to remove snow immediately after it falls.

The best time to remove snow is the early morning. At this time the snow is usually dry and has not been exposed to the direct sun and warming temperatures.
Slightly overlap each successive path to ensure all snow will be removed.
For large areas, start in the middle and throw snow to each side, so snow is not cleared more than once.
For extremely heavy snow, reduce the width of snow removal by overlapping previous path and moving slowly.
Throw snow downwind whenever possible.
Keep engine clean and clear of snow during use. This will help air flow and extend engine life.
After snow-throwing is completed, let the engine run for a few minutes to help dry off the moisture on the engine and prevent moving parts from freezing. Engage the auger/impeller to clear any remaining snow from inside the housing. Rotate the discharge chute to prevent it from freezing. Stop the engine, wait for all moving parts to stop, and remove all ice and snow from the snow thrower. With the engine off, pull the recoil starter handle several times to prevent the recoil starter from freezing up.

TRAVE LING
To travel from one work area to another:

Set the throttle to slow or part-throttle position.
Press down on the handlebars enough to raise front of the unit slightly off surface.
Engage the drive clutch without engaging auger clutch.

TRANSPORT

WARNING: Always shut off the engine, remove key, and dose fuel shutoff valve when transporting unit on a truck or trailer. Do not transport machine while engine is running.

Use extra care when loading or unloading the unit onto a trailer or truck.
Secure unit chassis to transport vehicle. Never secure from rods or linkages that could be damaged.

Setup Guide

To set up and operate the Yardmax YB6770,

Start by unpacking and assembling the components according to the provided instructions.
Ensure all parts are securely attached before starting. Fill the gas tank with the recommended type of fuel, and check the oil level.
Start the engine, allow it to warm up for a few seconds, and adjust the chute direction and speed settings as needed.
Always follow safety guidelines and maintain a safe distance from obstacles while operating the snow blower.

MAINTENANCE

LUBRICATION

AUGER GEARBOX of Yardmax Two-Stage Snow Blower YB6770

The gearbox was filled with lubricant to the proper level at the factory. Unless there is evidence of leakage or service has been performed on the gearbox, no additional lubricant should be required. If lubricant is required, use GL-5 or GL-6, SAEBS-95, EP gear oil lubricant. Do not use synthetic oil.

GENERAL LUBRICATION
Lightly lubricate all moving parts of the machine at the end of the season or every 25 operating hours.

general_lubrication_yardmax_two-stage_snow_blower_yb6770.png

WARNING: Do not allow grease or oil get on the friction disc, friction plate or belts. Do not excessively oil the machine; extra oil may enter the traction drive and cause the traction drive belt to slip.

When lubricating auger shaft, remove shear pins to apply oil inside the shaft and around spacers and flange bearings found at either end of the shaft.
Remove the wheels to apply grease the wheel shaft.

Troubleshooting

Problem	Cause	Remedy
Electric starter does not turn (on models so equipped)	1. Extension cord not connected 2. Extension cord is worn, corroded, or damaged 3. Power outlet not energized	1. Connect the extension cord to the outlet and/or the machine 2. Replace the extension cord 3. Have a qualified electrician energize the outlet
Engine fails to start	1. Choke not in CHOKE position 2. Engine not primed 3. Engine is flooded 4. Fuel shut-off valve closed 5. Throttle in STOP position or RUN/STOP switch in STOP 6. Spark plug wire loose or disconnected 7. Fuel tank empty or stale fuel 8. Faulty spark plug 9. Safety ignition key not inserted 10. Engine oil level in crankcase too low or too high	1. Move choke to CHOKE position 2. Prime engine as instructed 3. Wait a few minutes before restarting, do not prime 4. Open fuel shut-off valve 5. Move throttle to FAST or RUN position 6. Connect or tighten spark plug wire 7. Fill tank with clean gasoline and stabilizer 8. Clean, adjust gap, or replace spark plug 9. Insert safety ignition key 10. Adjust oil level in crankcase
Engine idles or runs roughly	1. Engine running on CHOKE 2. Fuel tank nearly empty or stale fuel 3. Contaminated fuel supply 4. Carburetor out of adjustment 5. Engine over-governed 6. Fuel shutoff valve not open or blockage in fuel line 7. Spark plug wire loose 8. Faulty spark plug 9. Engine oil level too low or too high	1. Move choke to RUN position 2. Fill tank with clean gasoline 3. Replace fuel 4. Contact a qualified repair technician 5. Open fuel shutoff valve or clean fuel line 6. Tighten spark plug wire 7. Adjust oil level
The engine overheats	Carburetor not adjusted properly	Contact a qualified repair technician
Excessive vibration	Loose parts or damaged parts	Tighten all fasteners or replace damaged parts
Loss of power	1. Spark plug wire loose 2. Gas cap vent hole plugged 3. Dirty or clogged muffler	1. Tighten spark plug wire 2. Clean or replace fuel cap 3. Clean or replace muffler
Loss of traction drive	1. Drive control cable not adjusted properly 2. Drive belt loose or damaged 3. Friction wheel worn	1. Adjust drive control cable 2. Replace drive belt 3. Replace friction wheel
Loss of snow discharge or slowing of snow discharge	1. Discharge chute clogged 2. Augers or impeller jammed 3. Auger control cable not adjusted properly 4. Auger belt loose or damaged 5. Shear pin(s) sheared 6. Throttle not in FAST position 7. Moving too fast 8. Throwing too much snow 9. Trying to remove heavy or wet snow 10. Auger frozen in place	1. Unclog discharge chute 2. Remove debris from augers or impeller 3. Adjust auger control cable 4. Replace auger belt 5. Replace shear pin(s) 6. Move throttle to FAST position 7. Shift into a lower gear 8. Reduce speed and width of swath 9. Do not overload with wet snow 10. Move unit to a warm place to thaw
Discharge chute does not lock or does not move	1. Chute control not adjusted properly 2. Chute assembly incorrectly installed	1. Adjust the discharge chute control 2. Reassemble chute control
Machine does not clear snow properly	1. Skid shoes or scraper blade not adjusted properly 2. Pressure in the tires not equal	1. Adjust the skid shoes or scraper blade 2. Check and adjust tire pressure

Yardmax YB6770 Pros & Cons

Pros

High Performance: Powerful 208cc OHV engine for efficient snow removal.
Large Clearing Capacity: Clears 26 inches wide and up to 12 inches deep.
Adjustable Chute Control: 180-degree chute rotation for precise snow placement.
Variable Speed Transmission: 6 forward and 2 reverse speeds for better control.

Cons

Weight and Size: Heavy and bulky, requiring significant storage space.
Noisy Operation: Can be loud during operation due to its powerful engine.
Maintenance Requirements: Regular maintenance is necessary to ensure optimal performance.

Customer Reviews

Customers have praised the Yardmax YB6770 for its robust performance, ease of use, and value for money. Many reviewers have noted its ability to handle deep snow with ease and its durability over multiple seasons. However, some users have mentioned that it can be heavy and difficult to maneuver for those with limited strength. Common complaints include the need for regular maintenance and some issues with starting the engine after extended periods of inactivity.

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