Johnson 150 Fuel Leak at Vapor Separator

[Revenger]

Hi guys. I have twin 1992 Johnson 150's (J150ELENC) and they both suffer from the same problem that did not appear to be there prior to a recent replacement of all the fuel lines/filters on the boat and engines.

My problem is that when I squeeze the primer bulbs, I get fuel squirting out from the top of the vapor seperator chambers. As a result, I can't keep the primer bulbs firm and I can't get the motors running again.

My question is two fold. First, could I have caused this problem by squeezing the primer bulbs too hard? Second, is the fix as simple as replacing the seal under the vapor separator cover or do I likely have a more serious problem such as the floats are now shot as well?

Thanks!

 

[tashasdaddy]

Re: Johnson 150 Fuel Leak at Vapor Separator

if they are leaking out of the separator, air is leaking in. get new seals. should not have done any other damage. unless crud got thru to the carbs.

 

[Chris1956]

Re: Johnson 150 Fuel Leak at Vapor Separator

Revenger, I did not think motors of that vintage had vapor seperators. If so, floats, inlet needles and seats as well as gaskets are available. Sounds like it is time to rebuild the seperators.

 

[tashasdaddy]

Re: Johnson 150 Fuel Leak at Vapor Separator

i think his talking about the fuel/water separator. if i was running twin 150's i'd have one, at least. should have one for each motor.

 

[Revenger]

Re: Johnson 150 Fuel Leak at Vapor Separator

Thanks for the replies. The separator I refer to is called out by the factory shop manual as the "vapor separation chamber". It is located behind the air box and is where the engine fuel filter is housed right next to the primer solenoid.

I picked up the new seals, but my local dealer did not stock the float and needle valve parts, or any sort of a rebuild kit, so hopefully the seals will do it.

These engines are new to me but they did start up fine on several occasions before I winterized them last fall. I can't help but believe that I caused the damage as part of the spring startup ritual and gas line replacement, since it is just too coincidental that both engines developed the same problem at the same time!