Mainship 40 Trawler Single Operator's Manual - page 65
Troubleshooting
Problem
Cause
Solution
Fuel overfl ows at the fi ll plate
(tank not full)
Fill or vent line blocked
Check lines. Clear obstruction from
line or straighten line if kinked.
Water or moisture in fuel tank
Cap on deck fuel fi ll plate not tight
Condensation forming on walls of
partially fi lled tank
Poor quality fuel from marina tanks
Check cap. Tighten.
Follow remedies for “Condensation”
above. If remedies fail to correct
problem, fuel tank and lines may
need to be drained and fl ushed. See
your dealer for service.
Diesel engines. Check fuel/water
separators. Drain if necessary.
Check with your dealer.
Engine cranks but will not start
(fuel system)
Lack of fuel
Clogged fuel fi lter
Clean fuel fi lter, check fuel level.
Check whether anti-siphon valve, if
so equipped, is stuck shut.
Improper starting procedure. Re-
view starting procedures in engine
manual.
Check and replace fuel fi lter.
Check fuel pump, fuel pump fi l-
ter, fuel fi lter, and fuel tank line for
cracked fl anges or restricted fi ttings.
Mainship 40 Trawler Single & Twin • Fuel System
5.11