Fuel line priming bulb

Moparman64

Recruit
Joined
Aug 20, 2012
Messages
2
I have a Mariner 115 two-stoke (1983) with a 13 gallon fixed tank. I had a cracked primer bulb that would not stay all the way hard. I replaced the fuel line and primer bulb with a Moeller replacement. The bulb is still not filling to the rock hard feel I remember. Should the bulb be hard or does it really matter? I have not had the boat in the water yet, but It starts up and runs fine in the driveway with no real "load" on the motor. Any ideas? -Thanks
 

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,758
Re: Fuel line priming bulb

The bulb should pump up firm with the engine off. Try holding the bulb vertically rather than horizontally. Once the engine starts, the bulb does not stay firm because fuel is being sucked through it. There is no pressure in the system at that point.
 

Moparman64

Recruit
Joined
Aug 20, 2012
Messages
2
Re: Fuel line priming bulb

The bulb should pump up firm with the engine off. Try holding the bulb vertically rather than horizontally. Once the engine starts, the bulb does not stay firm because fuel is being sucked through it. There is no pressure in the system at that point.

I'll give that a try, thanks a lot!
 
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