DR Power RapidFire 5.5 HP Subaru (July 2013 - Present) Engine Manual - Manual (Page 15)

CONTACT US AT www.DRpower.com 15
X: Troubleshooting
1. ENGINE STARTING DIFFICULTLY:
TROUBLE CAUSE REMEDY
Normal
cylind
er compressio
n
Norm
al
s
park
plu
g sp
ark
Som
ethin
g wrong wit
h the
fu
el
sy
stem
.
Fuel
supply
is not smooth or
no fuel su
ppl
y.
There is not enough fuel in fuel tank and fuel shutoff
is closed. Fill fuel, open fuel shutoff.
Air vent in the fuel filler cap is clogged Dredge air vent.
Fuel shutoff is clogged Clean first and then dredge
Improper or clogged main fuel flow hole. Readjust or clean, blow to get through.
Needle valve is not closed properly or start hole is
clogged. Dismantle needle valve and repair, clean, blow to get
through.
Float is damaged or sticking. Repair float
Fuel supply is normal.
Fuel is too filthy or deteriorated Replace
There is water in fuel. Replace
Too much fuel in engine Drain extra fuel, dry up spark plug electrodes.
Wrong fuel brand Select proper fuel brand corresponding with the
requirements.
N
orma
l fuel sup
pl
y sy
st
em.
Normal
hi
gh –
tension
line
Normal
hi
gh-
tension
line spark
Too much carbon deposit and dirt around
electrodes. Clear away.
Electrodes are burn damaged seriously or insulators
damaged. Replace spark plug.
Improper electrodes gap. Adjust to proper value.
High-ten
sion l
ine
not n
ormal
Norm
al
s
park
plug
High–tension line is damaged. Replace
Ignition coil is damaged. Replace
Magneto loses magnetism. Replace
Abnormal gap between ignition coil and flywheel. Adjust gap
TROUBLE CAUSE REMEDY
Abnormal c
yli
nder compression.
Normal
fuel s
upp
ly
s
yst
em.
Norm
al
s
park
plu
g.
Piston ring is worn to or even over its wear limit Replace
Piston ring is broken. Replace
Piston ring is sticking. Clear up carbon fouling.
Spark plug is not installed tight or without a gasket. Tighten with a gasket installed.
Air leakage between cylinder block and cylinder head. Check cylinder gasket, and the flatness of the surface
where cylinder block contacts the cylinder head
Tighten cylinder head bolts in proper order to proper
torque.
Air leakage in the valves Check valve clearance and tightness. Repair if
necessary.
If engine will still not start, contact DR Power Equipment.