-- 8 --
REPLACE SPARKPLUG
Replace spark plug each year to ensure the
engine starts easier and runs better. Set
spark plug gap at 0.034 inch (0.85 mm). Igni-
tion timing is fixed, nonadjustable.
1. Twist, then pull off spar k plug boot.
2. Remov e spark plug from cylinder and dis-
card.
3. Replac ew ith NGK BPMR71-9 spark plug
and tighten securely with a 3/4 inch (19
mm) socket wrench.
4. Reins tall the spark plug boot.
CARBURETORADJUSTMENTS
Yourcarburetor is equipped with limiter caps .
Carburetoradjus tment is a complicated task .
Werec ommend that you take your unit to an
authorized service dealer. D amage may occur if
you turn the needles beyond the limiter stops.
TROUBLE CAUSE REMEDY
Engine will not
start. 1. Engine flooded.
2. Fuel tank empty.
3. Spark plug not firing.
4. Fuel not reaching
carburetor.
5. Compression low.
1. See “Starting a Flooded Engine”
inO peration section.
2. Fill tank with correct fuel mixture.
3. Install new spark plug.
4. Check for dirty fuel filter; replace.
Check for kinked or split fuel line;
repair or replace.
5. Contact an authoriz ed service dealer.
Engine will not
idlepr operly.
1. Fuel not reaching
carburetor.
2. Carburetor requires
adjustment.
3. Crankshaft seals worn.
4. Compression low.
1. Check for dirty fuel filter; replace.
Check for kinked or split fuel line;
repair or replace.
2. See “Carburetor Adjustment” in
Service and Adjustments section.
3. Contact an authoriz ed service dealer
4. Contact an authoriz ed service dealer.
1. Air filter dirty.
2. Fuel not reaching
carburetor.
3. Spark plug fouled.
4. Carburetor requires
adjustment.
5. Carbon build up.
6. Compression low.
Engine will not
accelerate,
lacks power, or
dies under a
load.
1. Clean or replace air filter.
2. Check for dirty fuel filter; replace.
Check for kinked or split fuel line;
repair or replace.
3. Clean or replace spark plug
andr e-gap.
4. See “Carburetor Adjustment” in
Service and Adjustments section.
5. Contact an authorized ser vice dealer.
6. Contact an authorized ser vice dealer.
Engine smokes
excessively.
1. Choke partially on.
2. Fuel mixture incorrect.
3. Air filter dirty.
4. Carburetor requires
adjustment.
1. Adjust choke.
2. Empty fuel tank and refill with
correct fuel mixture.
3. Clean or replace air filter.
4. See “Carburetor Adjustment” in
Service and Adjustments section.
Engine runs hot. 1. Fuel mixture incorrect.
2. Spark plug incorrect.
3. Carburetor requires
adjustment.
4. Carbon build up.
1. See “Fueling Engine” in Operation
section.
2. Replace with correct s park plug.
3. See “Carburetor Adjustment” in
Service and Adjustments section.
4. Contact an authorized service dealer.
TROUBLESHOOTING TABLE
WARNING: Always stop unit and disconnect spar k plug before performing any of the
recommended remedies below other than remedies that requir e operation of the unit.