Troubleshooting Guide

ENGINE DOES NOT START

What To Check

Does the engine crank?

YES

Good compression?

YES

Does the tank contain fresh fuel of the proper grade?

YES

Is fuel visible and moving in the return line when priming?

YES

Is there spark at the spark plug wire terminal?

YES

Check the spark plug.

Possible Cause

Faulty recoil starter.

NO Fluid in the crankcase.

Internal damage.

Loose spark plug.

NO Excess wear on cylinder, piston, rings.

Fuel incorrect, stale or contaminated; NO mixture incorrect.

NO Check for clogged fuel filter and/or vent. Priming pump not functioning properly.

The ignition switch is in “O” (OFF) NO position.

Shorted ignition ground. Faulty ignition unit.

If the plug is wet, excess fuel may be in the cylinder.

The plug is fouled or improperly gapped.

The plug is damaged internally or of the wrong size.

Remedy

Consult with an authorized servicing dealer.

Tighten and re-test.

Consult with an authorized servicing dealer.

Refill with fresh, clean unleaded gasoline with a pump octane of 87 or higher mixed with

a 2-cycle air cooled mixing oil that meets or exceeds ISO-L-EGD and/or JASO FC classified oils at 50:1 gasoline/oil ratio.

Replace fuel filter or vent as required; restart.

Consult with an authorized servicing dealer.

Move switch to “I” (ON) position and restart.

Consult with an authorized servicing dealer.

Crank the engine with the plug removed, reinstall the plug and restart.

Clean and regap the plug to 0.024 - 0.028 inch (0.6 - 0.7 mm). Restart.

Replace the plug with an NGK BPMR6A or equivalent resistor type spark plug of the correct heat range. Set spark plug electrode gap to 0.024 - 0.028 inch (0.6 - 0.7 mm).

LOW POWER OUTPUT

 

What To Check

 

Possible Cause

 

Remedy

 

 

 

Operator is overworking the unit.

 

Shorten trimmer line. Cut at a slower rate.

 

Is the engine overheating?

 

 

 

 

 

 

 

 

 

 

 

Carburetor mixture is too lean.

 

Consult with an authorized servicing dealer.

 

 

 

 

 

Improper fuel ratio.

 

Refill with fresh, clean unleaded gasoline with

 

 

 

 

 

a pump octane of 87 or higher mixed with

 

 

 

 

 

a 2-cycle air cooled mixing oil that meets or

 

 

 

 

 

exceeds ISO-L-EGD and/or JASO FC classified

 

 

 

 

 

oils at 50:1 gasoline/oil ratio.

 

 

 

Fan, fan cover, cylinder fins dirty or

 

Clean, repair or replace as necessary.

 

 

 

damaged.

 

 

 

 

 

 

Carbon deposits on the piston or in

 

Consult with an authorized servicing dealer.

 

 

 

the muffler.

 

 

 

 

 

 

 

 

 

 

 

 

 

Clogged air cleaner element.

 

Service the air cleaner element.

 

Engine is rough at all

 

 

 

 

 

 

 

 

 

speeds. May also have

 

Loose or damaged spark plug.

 

Tighten or replace.

 

black smoke and/or

 

 

 

 

 

 

 

 

 

unburned fuel at the

 

Air leakage or clogged fuel line.

 

Repair or replace filter and/or fuel line.

 

exhaust.

 

 

 

 

 

 

 

 

 

 

 

Water in the fuel.

 

Replace the fuel. See page 10.

 

 

 

 

 

 

Piston seizure

 

Consult with an authorized servicing dealer.

 

 

 

 

 

 

 

 

Faulty carburetor and/or diaphragm.

 

 

 

 

 

 

Oveheating condition.

 

See above(Engine overheating).

 

Engine is knocking.

 

 

 

 

 

 

 

 

 

 

 

Improper fuel.

 

Check fuel octane rating; check for presence of

 

 

 

 

 

 

 

 

 

alcohol in the fuel (page 10). Refuel as necessary.

 

 

 

Carbon deposits in the combustion

 

Consult with an authorized servicing dealer.

 

 

 

chamber.

 

 

 

 

 

 

 

 

 

 

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Shindaiwa 81644 manual Troubleshooting Guide, Engine does not Start
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81644 specifications

The Shindaiwa 81644 is a remarkable piece of equipment designed for professionals in landscaping and agriculture. Renowned for its durability and performance, this model is an essential tool for anyone in need of a reliable, high-efficiency solution for their yard care and maintenance projects.

One of the standout features of the Shindaiwa 81644 is its powerful engine. The unit is equipped with a robust 25.4 cc 2-stroke engine that delivers an impressive power-to-weight ratio, ensuring efficient operation without compromising on performance. This kind of engine is designed for easy starting and provides a reliable output that allows users to tackle even the most challenging tasks with ease.

Another key characteristic of the Shindaiwa 81644 is its lightweight design. Weighing in at approximately 7.9 lbs, this model is designed to reduce operator fatigue, allowing for extended use without added strain. The ergonomic handle further enhances comfort, enabling a natural grip and offering better control during operation.

Technologically, the Shindaiwa 81644 incorporates advanced anti-vibration technology. This feature minimizes vibrations during use, ensuring a smoother experience while reducing the risk of operator fatigue. Additionally, the unit includes an adjustable throttle, allowing users to optimize their cutting speed based on the specific job at hand.

The durability of the Shindaiwa 81644 is another highlight. Constructed with high-quality materials, this equipment is built to withstand the rigors of regular use in various weather conditions. Its fuel-efficient engine also represents Shindaiwa's commitment to sustainability, minimizing environmental impact while maximizing performance.

For convenience, the Shindaiwa 81644 is designed with an easy-to-access air filter and spark plug, simplifying maintenance. This ensures that operators can keep their equipment in top condition with minimal effort.

In summary, the Shindaiwa 81644 combines power, efficiency, and user-friendly features, making it one of the most sought-after options for professionals looking to enhance their landscaping tools. Whether for commercial or personal use, this model stands out as a reliable choice that meets the demands of any outdoor maintenance project.
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