Evinrude 1990 120HP stalling when warm

dbdsaltydog · #1 June 30th, 2009, 04:35 AM

My Engine seems like it is starving for gas after it has run for about 20 minutes. I noticed the bulb in the fuel line was caving in so i replaced that and the inline filter but i still have the problem w/out the bulb caving. Is this a carb issue or over heating issue. The buzzer in the dash is staying on with or without the engine running...thank you!!!!

tashasdaddy · #2 June 30th, 2009, 06:04 AM

caving bulb, is a 99% sign that the fuel tank vent is closed or clogged. fuel restriction issue. pump cannot suck fuel out of a vacuum.

dbdsaltydog · #3 July 10th, 2009, 08:15 PM

Quote:

Originally Posted by tashasdaddy

caving bulb, is a 99% sign that the fuel tank vent is closed or clogged. fuel restriction issue. pump cannot suck fuel out of a vacuum.

thank you tashasdaddy for your reply! I had already replaced the vent at then end of the fuel line vent hose. when i took the old one off it appeared to be more than what i replaced it with. should there be more than just a vent on that hose?

tashasdaddy · #4 July 11th, 2009, 05:06 AM

can you blow air thru the vent line? you also could have a clogged pickup in the fuel tank. what ever the problem it is before the primer bulb.

115johnson78 · #5 July 12th, 2009, 11:05 AM

I had the same problem with my boat. If it is an built in tank, you might want to check the anti siphon to see if it is getting stuck.

dbdsaltydog · #6 July 15th, 2009, 08:42 PM

Quote:

Originally Posted by 115johnson78

I had the same problem with my boat. If it is an built in tank, you might want to check the anti siphon to see if it is getting stuck.

thank you 115johnson78! this is my first ob motor and it is a built in tank. i replaced the vent and i believe the old one included the anti siphon??? would it not run properly without the anti siphon???

115johnson78 · #7 July 15th, 2009, 09:22 PM

the anti siphon is located in fuel tank sender. in between there and the motor. mine runs just fine. it is use so that a hose pops loose the fuel stops. it is for saftey. you can remove and if it solves prob. the replace with a new one. your welcome.

dbdsaltydog · #8 July 16th, 2009, 07:20 AM

Quote:

Originally Posted by tashasdaddy

can you blow air thru the vent line? you also could have a clogged pickup in the fuel tank. what ever the problem it is before the primer bulb.

thank you tashas daddy! not sure if i can blow air through the line but i replaced the old vent on the vent line with a new one and i believe the old one was an anti siphon vent. the one i replaced it with does not. do you think that could create the problem?