85 Evinrude

crski

Cadet
Joined
May 22, 2005
Messages
7
I have an 85 horse Evinrude that gets used about 1 or 2 times a year. We crank it up about every 2-3 months. I put in carburator kits last year because of a fuel leakage from the bowls. We always seem to have some sort of problem with the high speed end of it and idling some times. The latest problem is when you are moving along on the water, the motor starts running out of gas. I checked it out and found the pump bulb on the fuel line colapsed. I replaced fuel tank, line and bulb. Still does the same thing. Apparently it is not getting enough air. Can't figure out why. Also, as I said, when you give it the throttle, it tries to take off but heitates then maybe it will all of a sudden "kick in" and go. Most of the time though it will sit there and stuggle to take off. Any suggestions?
 

Walker

Captain
Joined
Jun 15, 2002
Messages
3,085
Re: 85 Evinrude

If you replace everything including the tank then you either have the tank vent closed, or its stopped up or you have the bulb backwards
 
D

DJ

Guest
Re: 85 Evinrude

crski,<br /><br />A collapsed bulb is a sure sign of a fuel restriction, from the tank end. Could be no vent, clogged vent. etc.<br /><br />As an experiment, run the boat with the fuel filler cap loose.
 

crski

Cadet
Joined
May 22, 2005
Messages
7
Re: 85 Evinrude

I think you're right. It has to be at the tank. I have checked bulb direction etc. I saw an earlier post describing the same problems and he said it was the real fine filter material used in the tank hose at bottom of the tank restricting gas flow. Since I have an inline filter as well, I think I will remove the tank filter and see what happens.<br /><br />I was also reading other posts describing the "no high speed". Do you think I am losing a coil under load? What is the best way to check? Thanks for your replies.
 

Cricket Too

Lieutenant Commander
Joined
May 14, 2003
Messages
1,732
Re: 85 Evinrude

Since your primer bulb is collapsing, I would focus on that, try running the tank with the cap loose to act as a vent, tackle one thing at a time.
 
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