Service Diagnosis - Pioneer 1073 Operator's Manual

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ALWAYS USE GENUINE PIONEER PARTS AND ACCESSORIES
TROUBLE
Engine fails to stare.
Engine cuts out, leans
our, br misfires",
Engine lacks powe r.
Engine overheats.
SERVICE DIAGNOSIS
PROBABLE CAUSE
Fuel rank empty.
Engi ne not choked.
Carburewr adjustments.
Over-choking.
Flooded engine.
Spark Plug.
Magneto .
·Plugged or frost covere d pickup
in fuel tank.
*
Plugge d impulse hoh: in carburetor,
misaligned carbureror gasket or rc:.:cd
valve gasket.
*
Frozen gas line or icc in carb uretor
fi lter.
Short circuit in ignition system.
Fouled, wet or damaged spark plug .
Magneto: Faulty breaker points, coil,
condenser, ignition wire or conneceion.
Partial blockage in fuel system.
Carb uretor malfunctions.
Dirt in fuel lines.
Pu ncture in fuel lines.
Incorrect fuel mixture .
Carbure(Qr out of adjustmellL
Exhaust pon s or muffler screen clogged.
Air imake filter clogged.
Poor compression.
Cylinder fins or air system clogged.
Incorrect fuel mixture.
Carburetor lean.
Leaking cy lind er base or crankcase
gaskets.
Leaking cra nkcase seals.
REMEDY
FiH with
correct
fuel mixture.
Choke engine.
See starting instructions.
Open throttle and pull starter until engine fires.
If engine is continually flooding. check for plug-
ged air filter.
When performing th is test
ensure the absence of fuel
in the rcst area.
Remo vc plug, ckan and adJllsL Re anach wire and
hold met al scat of plug against motor. Pull starter.
A blue spark should jump gap between electrodes.
Disconnect wire from spark plug. Hold so metal
end is 1/4" from clean metal surface. (Away from
ga' s tank ). Pull starter. Th ere should be a strong
blue spark across the gap . If no spark, the trouble
is breaker poims, coil, condenser. shoned wire, or
switch.
Remove, clean or replace. Check for icc, water and
dirt in fuel tank.
Remove and clean and realign or replace gasket(s) .
+
Remove and clean. De-ice additive used in pres-
cribed proponion will counteract this. (One teas-
poonful to a full tank of fuel).
+ (OMC 2
+
4 fouc:! Conditiom:r)
Check all \Vires and connections.
C\..:an and adjust, or re place .
Check.
Clean our carefully and check carb uretor.
See your Authorized Pioneer Dealer.
Check and ckan.
Replace.
Drain tank, rdill with correct mixture.
Adjust carburetor.
Clean.
Clean or replace.
See your Authorized Pioneer Dealer
CJean.
Drain tank, rcfill with correct mixture.
Adjust.
See your Authoriz.ed Pioneer Dealer.
See your Authorized Pioneer Dealer.
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