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308-125 17
PROBLEM CAUSE SOLUTION
Engine starts but dies
Oil level drops below oil sensor
Add oil.
Displacement
pump output low
on
upstroke
Siphon hose strainer is clogged
Clean strainer
.
Piston ball check not seating
Service piston ball check. See page 19.
Piston packings worn or damaged
Replace packings. See page 19.
Sleeve o–ring in displacement pump
worn or damaged
Replace o–ring gasket. See page 19.
Displacement
pump output low
on
downstroke or both strokes
Siphon hose strainer is clogged
Clean strainer
.
Piston packings worn or damaged
Replace packings. See page 19.
Intake valve ball check not seating
properly
Clean and service intake valve. See page
19.
Clutch
worn or damaged
Replace clutch. See page 26.
Coating leaks into wet–cup
Loose wet–cup
T
ighten wet–cup just enough to stop
leakage.
Throat packings worn or damaged
Replace packings. See page 19.
Displacement rod worn or damaged
Replace displacement rod. See page 19.
Low fluid delivery
Siphon hose strainer is clogged.
Clean strainer
.
Pressure setting too low
Increase pressure. See
Startup,
Step 9, page 1
1.
Engine RPM too low
Increase throttle setting. See
Startup,
Steps 4b and 9, pages 10 and 1
1.
Large pressure drop in hose
Use larger diameter hose.
Spitting from gun Air in fluid pump or hose
Change
gasket in siphon hose quick discon
-
nect coupling, if worn or missing. Replace
pump cylinder o–ring. Then prime the
pump.
See
Startup
, page 10.
Fluid supply is low or empty
Refill and prime the pump. See Startup,
page
10. Check fluid supply often to prevent
running
the pump dry
.