quick rpm deceleration then die 140hp

H

henry1

Recruit
Joined
May 30, 2006
Messages
4
my 1990 140 v4 loses rpm's quickly then dies out. takes a while to restart . restarts, get up to any speed ,insignificant and either speed up or slow down and she'll die. any thoughts guru's? thanks in advance.
 
W

Walker

Captain
Joined
Jun 15, 2002
Messages
3,085
Re: quick rpm deceleration then die 140hp

Squeeze the bulb when it starts to decelerate to rule out the fuel pump, tank, and hoses.<br />Look for any fuel leaks on same and on/around carburators.
 
H

henry1

Recruit
Joined
May 30, 2006
Messages
4
Re: quick rpm deceleration then die 140hp

Thanks Walker. how hard should the bulb be if the fuel pump is working properly? will try a.s.a.p. and hope to return the favor right back to ya one day . regards, H. oh yeah, the only thing I did differently from last year is when I changed the fuel filter it wasn't exactly the same one but fit and screwed in tight hopefully that isn't a problem.
 
W

Walker

Captain
Joined
Jun 15, 2002
Messages
3,085
Re: quick rpm deceleration then die 140hp

The bulb should pump up solid before you start the engine. Once the engine is running the bulb will get soft but shouldn't collapse. With the engine running the bulb is nothing more that a part of a siphon hose. <br />If your fuel pump is bad or if you are getting air into the fuel line then pumping the bulb when the engine starts to decelerate should cause the rpms to pick back up.
 
H

henry1

Recruit
Joined
May 30, 2006
Messages
4
Re: quick rpm deceleration then die 140hp

Thank you Sir, I copy.will do. out.
 
C

chris abela

Seaman Apprentice
Joined
Sep 25, 2002
Messages
41
Re: quick rpm deceleration then die 140hp

its a long story, but check your breather hole in the oil tank as you might be running the engine without oil in the fuel. Happened to me.
 
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