losing prime getting frustrated

S

sfltintman

Recruit
Joined
Oct 22, 2008
Messages
4
I have a 80"s (can't seem to find year on motor) Evinrude 90 hp V4 VRO (VRO removed) motor will intermitently lose prime ball goes flat, engine dies I have replaced all fuel lines, removed tank checked pick up and vent lines all clear as well as tank.Replaced vented fuel cap..... sometimes it will run for hours with no problem then it starts,,,,,,,, ball implodes motor dies etc but it starts right back up this happens mostly under load seems to idle with no problem. If you pull the ball from the fuel line with motor running and put it back on this seems to fix thre problem but not the fix I'm looking for getting frustrated any suggestions would be appreciated
 
iwombat

iwombat

Captain
Joined
Jul 12, 2006
Messages
3,767
Re: losing prime getting frustrated

Have you checked your tank's anti-siphon valve? Sounds like that may be the culprit.
 
K

karlow1

Petty Officer 2nd Class
Joined
Jun 24, 2008
Messages
161
Re: losing prime getting frustrated

Simple problem, somthing down stream of the ball is pugging up or collapsing or the tank is not venting. I wish my issues were so simple. There could be someting driffting around inside the tank pluging the pickup.

Take a look
 
S

sfltintman

Recruit
Joined
Oct 22, 2008
Messages
4
Re: losing prime getting frustrated

put new fill line no anti siphon and replaced all fuel lines
 
E

ezeke

Supreme Mariner
Joined
Sep 19, 2003
Messages
12,532
Re: losing prime getting frustrated

Did you try a different primer bulb? What size fuel line are you using? How far below the fuel pump is the bottom of the tank?
 
S

sfltintman

Recruit
Joined
Oct 22, 2008
Messages
4
Re: losing prime getting frustrated

brand new 3/8 bulb tank is under center console 2 ' so tank is about 3' down
 
E

ezeke

Supreme Mariner
Joined
Sep 19, 2003
Messages
12,532
Re: losing prime getting frustrated

Might be something floating in the tank that gets to the pickup.

The vent on the outside of the boat has a screen that can get blocked by corrosion.
 
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