SHINDAIWA M235 (01) PDF MANUAL

Please adhere to the following safety warnings when operating the SHINDAIWA M235:

DANGER: The safety alert symbol accompanied by the word “DANGER” calls attention to an act or condition which WILL lead to serious personal injury or death if not avoided.

WARNING: The safety alert symbol accompanied by the word “WARNING” calls attention to an act or condition which CAN lead to serious personal injury or death if not avoided.

CAUTION: The safety alert symbol accompanied by the word “CAUTION” calls attention to an act or condition which might lead to minor or moderate personal injury if not avoided.

Engine Exhaust: The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

Read Literature: Read and understand all provided literature before use. Failure to do so could result in serious injury.

Hot Surfaces: The muffler or catalytic muffler and surrounding cover may become extremely hot. Always keep clear of exhaust and muffler area, otherwise serious personal injury might occur.

Electrical Wires: All over head electrical conductors and communications wires can have electricity flow with high voltages. This unit is not insulated against electrical current. Never touch wires directly or indirectly, otherwise serious injury or death can result.

Ventilation: Do not operate this product indoors or in inadequately ventilated areas. Engine exhaust contains poisonous emissions and can cause serious injury or death.

Moving Parts: Moving parts can amputate fingers or cause severe injuries. Keep hands, clothing and loose objects away from all openings. Always stop engine, disconnect spark plug, and make sure all moving parts have come to a complete stop before removing obstructions, clearing debris, or servicing unit.

Proper clothing and safety gear must be worn when operating the SHINDAIWA M235 to reduce the risk of injury.

Physical Condition: Do not operate the unit if you are tired, sick, taking medication, or have consumed alcohol or drugs.

Eye Protection: Eye protection that meets ANSI Z87.1 or CE requirements must be worn. For additional safety, a full-face shield can be worn over safety glasses or goggles for protection from sharp branches or flying debris.

Hand Protection: Wear sturdy, no-slip, rubber work gloves to improve grip and protect against cuts, scratches, and vibration.

Hearing and Ear Protection: ECHO recommends wearing personal protective equipment for hearing whenever the unit is used.

Breathing Protection: Operators sensitive to dust or other airborne allergens may need to wear a dust mask.

Proper Clothing:

• Wear snug-fitting, durable clothing.

• Pants should have long legs, and shirts should have long sleeves. DO NOT WEAR SHORTS.

• DO NOT WEAR TIES, SCARVES, JEWELRY, or clothing with loose or hanging items.

• Keep clothing buttoned or zipped, and keep shirt tails tucked in.

• Wear sturdy work shoes with nonskid rubber soles. DO NOT WEAR OPEN TOED SHOES or operate with bare feet.

• Keep long hair retained with a cap or net.

To reduce the risk of RSI/CTS (Carpal Tunnel Syndrome) when operating the SHINDAIWA M235, follow these guidelines:

• Avoid using your wrist in a bent, extended, or twisted position. Maintain a straight wrist position.

• When grasping, use your whole hand, not just the thumb and index finger.

• Take periodic breaks to minimize repetition and rest your hands.

• Reduce the speed and force with which you do the repetitive movement.

• Do exercises to strengthen the hand and arm muscles.

• Immediately stop using all power equipment and consult a doctor if you feel tingling, numbness, or pain in the fingers, hands, wrists, or arms.

Before using your SHINDAIWA M235, perform the following checks to ensure safe operation:

• Use only SHINDAIWA attachments. Read and comply with all safety instructions listed in the manual.

• Check the unit for loose/missing nuts, bolts, and screws. Tighten and/or replace as needed.

• Inspect guards and shields for damage and to ensure they are securely in place. Replace if damaged or missing.

• Check that the attachment is firmly attached and in safe operating condition.

• Check that the handle and harness (if included) are adjusted for safe, comfortable operation.

To assemble the lower shaft to the SHINDAIWA M235 power head, follow these steps. Do not perform this procedure with the engine running.

1. Set the Power Head/Shaft Assembly on a level surface.

2. Pull the locater pin (A) out, and turn it counter-clockwise ¼ turn to the lock-out position.

3. Remove the vinyl cap from the attachment drive shaft and any cardboard spacer.

4. Carefully fit the attachment drive shaft assembly into the coupler (B), aligning it with the decal assembly line (C). Ensure the inner lower drive shaft engages the square upper drive shaft socket.

5. Rotate the locater pin (A) ¼ turn clockwise to engage the lower shaft hole. Ensure the locater pin is fully engaged by twisting the lower drive shaft; the pin should snap flush into the coupler. Full engagement prevents further shaft rotation.

6. Secure the lower shaft assembly to the coupler by tightening the clamping knob (D).

Position the support handle for comfortable operation and securely tighten the screws. Note that the label on the shaft shows the minimum spacing for the support handle location.

Fuel Requirements:

• Gasoline: Use fresh (purchased within the last 30 days) 89 Octane [R+M/2] (mid grade or higher) gasoline. Gasoline may contain up to 10% Ethanol (E10) or 15% MTBE. Gasoline containing methanol (wood alcohol) is NOT approved.

• Warning: Diesel fuels and alternative fuels, such as E15 (15% ethanol) or E85 (85% ethanol), are NOT approved for use in the SHINDAIWA M235 engine.

• Two-Stroke Oil: A 2-stroke engine oil meeting ISO-L-EGD (ISO/CD 13738) and J.A.S.O. FD Standards must be used. Shindaiwa branded 2-stroke oils meet these standards.

Handling Fuel: Fuel is VERY flammable. Use extreme care.

• Use an approved fuel container.

• DO NOT smoke near fuel.

• DO NOT allow flames or sparks near fuel.

• Fuel tanks/cans may be under pressure. Always loosen fuel caps slowly to allow pressure to equalize.

• NEVER refuel a unit when the engine is HOT or RUNNING.

• ALWAYS fill fuel tanks outdoors over bare ground. DO NOT fill indoors.

• DO NOT overfill the fuel tank. Wipe up spills immediately.

• Securely tighten the fuel tank cap and close the fuel container after refueling.

• Inspect for fuel leakage. If leakage is found, do not start or operate the unit until it is repaired.

• Move at least 3 m (10 ft.) from the refueling location before starting the engine.

Mixing Instructions (50:1 Ratio):

1. Fill an approved fuel container with half of the required amount of gasoline.

2. Add the proper amount of engine oil to the gasoline.

3. Close the container and shake to mix oil with gasoline.

4. Add the remaining gasoline, close the fuel container, and remix.

Fuel to Oil Mix – 50:1 Ratio

US		Metric
Gas	Oil	Gas	Oil
gal.	fl. oz.	L	cc
1	2.6	5	100
2	5.2	10	200
5	13	25	500

Note: Stored fuel ages. Do not mix more fuel than you expect to use in thirty (30) days, or ninety (90) days when a fuel stabilizer is added. ALWAYS shake the fuel container thoroughly before each use.

WARNING: The attachment will operate immediately when the engine starts. Keep movable parts away from objects that could become entangled or thrown.

1. Stop Switch: Move the stop switch (A) away from the STOP position.

2. Choke: Move the choke lever (B) to the COLD START (closed) position.

3. Purge Bulb: Pump the purge bulb (C) until fuel is visible and flows freely in the clear fuel tank return line. Pump the bulb an additional 4 or 5 times.

4. Recoil Starter: Lay the unit on a flat area and keep the attachment clear of obstacles. Firmly grasp the throttle handle and throttle trigger lockout with your left hand and fully depress the throttle trigger to the wide-open position. Rapidly pull the recoil starter handle/rope (D) until the engine fires (maximum five pulls).

5. Choke: After the engine fires, move the choke lever (B) to the RUN (open) position. Firmly grasp the throttle handle and trigger lockout again, fully depressing the trigger to the wide-open position. Pull the starter handle/rope until the engine starts and runs. Release the throttle trigger and allow the unit to warm up at idle for several minutes.

Note: If the engine does not start with the choke in the “Run” position after 5 pulls, repeat instructions 2 – 5.

6. Throttle Trigger: After the engine has warmed up, grip the throttle handle and support handle. Depress the throttle trigger lockout, and gradually depress the throttle trigger to increase engine RPM to operating speed.

The starting procedure for a warm SHINDAIWA M235 engine is the same as a Cold Start except DO NOT close the choke, and do not depress the throttle trigger to the wide-open position. The attachment should not move at idle.

1. Stop Switch: Move the stop switch (A) away from the STOP position.

2. Purge Bulb: Pump the purge bulb (C) until fuel is visible and flows freely in the clear fuel tank return line. Pump an additional 4 or 5 times.

3. Recoil Starter: Lay the unit on a flat area, clear of obstacles. Firmly grip the throttle handle and throttle trigger lockout with your left hand. Rapidly pull the recoil starter handle/rope (D) until the engine fires.

Note: If the engine does not start after 5 pulls, use the Cold Start Procedure.

1. Throttle: Release the throttle trigger and allow the engine to return to idle before shutting it off.

2. Stop Switch: Move the stop switch (A) to the STOP position.

WARNING: If the engine does not stop when the stop switch is moved to the STOP position, close the choke to the COLD START position to stall the engine. Have your dealer repair the stop switch before using the unit again.

The following table outlines the maintenance intervals for the SHINDAIWA M235. Time intervals shown are maximums. Actual use will determine the frequency of required maintenance.

COMPONENT/SYSTEM	MAINTENANCE PROCEDURE	REQUIRED SKILL LEVEL
Daily or Before Use
Air Filter	Inspect/Clean *	1
Choke Shutter	Inspect/Clean *	1
Fuel System	Inspect	1
Cooling System	Inspect/Clean	2
Recoil Starter Rope	Inspect/Clean *	1
Screws/Nuts/Bolts	Inspect/Tighten/Replace *	1
Every Refuel
Fuel System	Inspect ³	1
3 Months
Air Filter	Replace *	1
Fuel Filter	Inspect *	1
Fuel Cap Gasket	Inspect *	1
Spark Plug	Inspect/Clean/Replace *	1
Muffler Spark Arrestor	Inspect/Clean/Replace *	2
Cylinder Exhaust Port	Inspect/Clean/De-carbon	2
Drive Shaft (Flex Cable Models)	Grease ¹	2
Gear Housing	Grease ²	2
Yearly
Fuel Filter	Inspect/Replace *	1
Fuel Cap Gasket	Replace *	1

Skill Levels:

Level 1 = Easy to do. Common tools may be required.

Level 2 = Moderate difficulty. Some specialized tools may be required.

Level 3 = See your dealer.

Maintenance Procedure Notes:

¹ Apply lithium based grease every 25 hours of use.

² Apply lithium based grease every 50 hours of use.

³ Action required after the first 10 hours of use.

* Replacement is recommended based on the finding of damage or wear during inspection.

This is a Level 1 maintenance task.

1. Close the choke (COLD START position) to prevent dirt from entering the carburetor.

2. Brush accumulated dirt from the air cleaner area.

3. Remove the air filter cover and brush dirt from inside the cover.

4. Remove the foam pre-filter (B) and air filter (C) and clean as follows:

• Foam Pre-filter: Clean in a water/detergent solution, rinse with clean water, wrap in a clean, dry cloth, and squeeze dry (do not wring). Allow it to dry completely before reuse. Do not oil.

• Air Filter: Lightly brush debris from the filter. Replace the filter if it is damaged, fuel-soaked, very dirty, or if the rubber sealing edges are deformed.

5. Assemble the components in reverse order.

This is a Level 1 maintenance task. DANGER: Fuel is VERY flammable. Use extreme care.

1. Use a clean rag to remove loose dirt from around the fuel cap and empty the fuel tank.

2. Pull the fuel filter from the tank. Do not damage the fuel line.

3. Do not remove the wire coil clamp. Pinch the fuel filter with the fingers of one hand and the fuel line with the other hand. Pull and twist slightly to separate.

4. Install the new filter with the reverse action.

This is a Level 2 maintenance task. Use only NGK BPMR8Y spark plug, otherwise severe engine damage may occur.

1. Remove the spark plug and check for fouling, and a worn and rounded center electrode.

2. Clean the plug or replace it with a new one. DO NOT sand blast to clean, as remaining sand will damage the engine.

3. Adjust the spark plug gap to 0.65 mm (0.026 in.) by bending the outer electrode.

4. Tighten the spark plug to 150-170 kgf·cm (130-150 lbf·in).

This is a Level 2 maintenance task. To maintain proper engine operating temperatures, cooling air must pass freely through the cylinder fin area.

1. Remove the spark plug lead.

2. Close the choke (COLD START position). Remove the air cleaner cover (A).

3. Remove the engine cover (B).

4. Use a brush to remove dirt from the cylinder fins. DO NOT use a metal scraper.

5. Remove the ignition wires from the clip for cleaning.

6. Remove grass and leaves from the grid between the recoil starter and fuel tank.

7. Assemble components in reverse order.

This is a Level 2 maintenance task.

Spark Arrestor Screen Cleaning:

1. Remove the spark plug lead and engine cover.

2. Place the piston at Top Dead Center (TDC) to prevent carbon/dirt from entering the cylinder.

3. Remove the spark arrestor screen cover (C), gaskets (D), (E), and screen (F) from the muffler body.

4. Clean carbon deposits from muffler components. Be careful not to damage the catalytic element inside the muffler.

5. Replace the screen if it is cracked, plugged, or has holes burned through.

6. Assemble components in reverse order.

Exhaust Port Cleaning:

1. Remove the spark plug lead and engine cover.

2. Place the piston at top dead center. Remove the muffler (A) and heat shield (B).

3. Use a wood or plastic scraping tool to clean deposits from the cylinder exhaust port (C). Never use a metal tool. Do not allow carbon particles to enter the cylinder.

4. Inspect the heat shield and replace if damaged.

5. Install the heat shield and muffler.

6. Tighten muffler mounting bolts (or nuts) to 90-110 kgf·cm (80-95 lbf·in).

7. Install the engine cover and attach the spark plug lead.

8. Start the engine and warm it to operating temperature.

9. Stop the engine and re-tighten the mounting bolts (or nuts) to specifications.

This is a Level 2 maintenance task. New engines must be operated for a minimum of two tanks of fuel for break-in before adjustments are made. Idle speed can be adjusted as required.

WARNING: The cutting attachment may be moving during carburetor adjustments. Wear protective equipment and observe all safety instructions. When adjustment is complete, the cutting attachment should not move at idle.

1. Check the idle speed and reset if necessary. The idle speed should be set to 3000 RPM (see Specifications). Turn the idle screw (A) clockwise to increase idle speed; turn it counterclockwise to decrease idle speed.

High Altitude Operation: This engine is factory adjusted for performance up to 330 m (1100 ft.) above sea level. For operation above this altitude, the carburetor may need to be adjusted by an authorized service dealer. The carburetor must be re-adjusted when operating below 330 m (1100 ft.) to prevent severe engine damage.

This is a Level 1 maintenance task. You will need Lithium Based Grease.

1. Loosen the clamping knob (A).

2. Pull the locater pin (B) and rotate it ¼ turn counterclockwise to the lockout position.

3. Remove the attachment.

4. Remove the coupler from the upper drive shaft assembly by loosening the clamping screw (C) and removing the set screw (D).

5. Remove the upper flex cable (E), wipe it clean, and apply a thin coating of 15 ml (0.5 oz.) of grease.

6. Install the cable. Make sure that the flex cable fully engages into the clutch square drive socket.

7. Slide the coupler on the upper drive shaft until fully seated, and align the set screw hole in the coupling with the hole in the upper drive shaft.

8. Install and tighten the set screw (D), and tighten the clamping screw (C).

Do not store your SHINDAIWA M235 for 30 days or longer without performing the following protective storage maintenance:

1. Store the unit in a dry, dust-free place, out of the reach of children. DANGER: Do not store in an enclosure where fuel fumes may accumulate or reach an open flame or spark.

2. Place the stop switch in the “OFF” position.

3. Remove any accumulation of grease, oil, dirt, and debris from the exterior of the unit.

4. Perform all periodic lubrication and services that are required.

5. Tighten all the screws and nuts.

6. Drain the fuel tank completely. Press the purge bulb 6-7 times to remove remaining fuel from the carburetor, then drain the tank again. Close the choke, start and run the engine until it stops due to lack of fuel.

7. Allow the engine to cool. Remove the spark plug lead from the spark plug. Remove the spark plug. Pour 7 cc (0.25 oz.) of fresh, clean, two-stroke engine oil into the cylinder through the spark plug hole.

8. Pull the recoil starter handle 2-3 times to distribute the oil inside the engine.

9. Observe the piston location through the spark plug hole. Pull the recoil handle slowly until the piston reaches the top of its travel and leave it there.

10. Install the spark plug. Connect the spark plug lead to the spark plug.

Use the following chart to troubleshoot common engine problems with your SHINDAIWA M235. DANGER: Fuel vapors are extremely flammable and can cause fire and/or explosion. Never test for ignition spark by grounding the spark plug near the cylinder plug hole.

ENGINE PROBLEM TROUBLESHOOTING CHART

Problem	Check	Status	Cause	Remedy
Engine starts hard or does not start	Fuel at carburetor	No fuel at carburetor	Fuel strainer or fuel line obstructed	Clean or replace
		No fuel at cylinder	Carburetor	See your dealer
	Fuel at cylinder	Muffler wet with fuel	Fuel mixture too rich	OPEN choke Clean or replace air filter Adjust carburetor See your dealer
	Spark at end of plug wire	No spark	STOP switch OFF – Electrical problem – Interlock switch	Turn switch to ON See your dealer
Engine does not start	Spark at plug	No spark	Incorrect gap – Covered with carbon – Fouled with fuel – Plug defective	Adjust to 0.65 mm (0.026 in.) Clean or replace plug
Engine runs, but dies	Air filter	Air filter dirty	Normal wear	Clean or replace
	Fuel filter	Fuel filter dirty	Contaminants or residue in fuel	Replace filter or replace fuel
Engine does not accelerate properly	Fuel vent	Fuel vent plugged	Contaminated fuel	Clean or replace
Engine runs, but dies	Spark plug	Plug dirty or worn	Normal wear	Clean and adjust or replace
	Carburetor	Improper adjustment	Vibration	Adjust
Engine runs, but dies or does not accelerate properly	Cooling system	Cooling system dirty or plugged	Extended operation in dirty or dusty locations	Clean
Engine does not accelerate properly	Spark arrestor screen	Spark arrestor screen plugged	Normal wear	Replace
Engine does not crank	N/A		Internal engine problem	See your dealer

MODEL	M235
Length	1033 mm (40.7 in.)
Width	251 mm (9.9 in.)
Height	237 mm (9.3 in.)
Weight (dry)	4.4 kg (9.8 lb.)
Engine Type	Air cooled, two-stroke, single cylinder gasoline engine.
Bore	32.2 mm (1.27 in.)
Stroke	26 mm (1.02 in.)
Displacement	21.2 cc (1.29 in.³)
Exhaust	Spark arrestor muffler or spark arrestor muffler with catalyst.
Carburetor	Diaphragm with purge pump.
Ignition System	Flywheel magneto, capacitor discharge ignition type.
Spark Plug	NGK BPM8Y (BPMR8Y Canada) – Gap 0.65 mm (0.026 in.)
Fuel	Mixed (gasoline and two-stroke oil)
Fuel to Oil Ratio	50:1
Gasoline	Use 89 Octane unleaded. Do not use fuel containing methyl alcohol, more than 10% ethyl alcohol or 15% MTBE. Do not use alternative fuels such as E15 or E85.
Oil	ISO-L-EGD (ISO/CD 13738) and J.A.S.O. M345-FD, two-stroke, air-cooled engine oil.
Fuel Tank Capacity	0.42 l (14.2 US fl. oz.)
Starter System	Automatic Recoil Starter
Clutch	Centrifugal Type
Handle	D-loop type with rubber anti-vibration grip.
Idle Speed	3000 RPM
Clutch Engagement Speed	4300 RPM
Wide Open Throttle Speed (W.O.T.)	9000 RPM