Reply To: 1969 Evinrude / 1971 Johnson 9.5 Runs Poor

[Don]

Buccaneer wrote:

Fleetwin, I didn’t touch the “working” fuel pump that’s running the motor.
The little square pump is from my parts motor, and I wanted to rebuild just to have “handy” for when
I need it. I got the pump apart without loosing any springs, but that’s not to say
I’ll ever get it back together again, lol.

On my agenda today is to mix up some 50:1 gas……. something I never have
a use for around here with my mostly pre-1960 collection.

OK, sounds good.  Just make sure its “up arrow” corresponds properly to the mounting position on your engine.  Once installed on the engine, you could also try blowing back through the pump from the carb line back through to the fuel supply port on the cap.  You should not be able to blow backwards, something is wrong if you can.  Again, don’t try this test unless the pump is either installed on the engine, or you have secured the two empty screw holes in the pump with screws and nuts.  Those plastic caps are notorious for cracking as well, so don’t be fooled into a negative test result just due to a cracked filter cover/cap.

OK, let me try to correct myself a bit.  I guess the air should not even be able to blow back into the cover cavity if the pump is “OK”.  So, I guess the pump test would be negative/fail even with the cracked cover because air should have not be able to enter that cavity when blowing backwards.   Nonetheless, those darn cap/covers crack easily.

Please be sure to replace that cheesy impeller though.