Fuel pump MOD

J

jason32038

Chief Petty Officer
Joined
May 25, 2009
Messages
555
I was looking at the port cover for the fuel pump and was wondering if I could very slightly enlarge the port holes on the port cover for the fuel pump to improve fuel flow by increasing the the vacuum. Has anyone done this? 86' 85hp force
 
roscoe

roscoe

Supreme Mariner
Joined
Oct 30, 2002
Messages
21,667
Re: Fuel pump MOD

Haven't done it.
Don't know why you would want to.
That pump can supply more fuel than the motor can use.
 
Frank Acampora

Frank Acampora

Supreme Mariner
Joined
Jan 19, 2007
Messages
12,004
Re: Fuel pump MOD

NO! Won't do anything. Port size is quite sufficient for its intended use and enlarging will only increase the chance of ripping the diaphragm.

Pressure and vacuum only ranges from 2 to 6 PSI and the stock port area will always be able to fully deflect the diaphragm.

Same pump supplies fuel to a 125 so it is more than enough for an 85.
 
J

jason32038

Chief Petty Officer
Joined
May 25, 2009
Messages
555
Re: Fuel pump MOD

Ok thanks guys! My crazy mind is always thinking about this engine and how to make it better lol
 
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