1977 evinrude 140hp 2 stroke

R

Rick0122

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May 15, 2004
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I am new to this. took a boat that was given to me by my step father, to the lake. when i idle, and give it gas, it runs good for awhile, about 30mph, then it just stops like it does not have fuel. i notice when it does this the primer bulb is compressed all the way. like the pick up in the tank is clogged or something. after that happens, it takes awhile to get it going again. the tank has been cleaned out. the only thing i can think of at this time is that maybe the pickup hose is sitting on the bottom of the tank .any advice is welcome :confused:
 
Joe Reeves

Joe Reeves

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Feb 24, 2002
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13,262
Re: 1977 evinrude 140hp 2 stroke

(Fuel Anti Siphon Valve)<br />(J. Reeves)<br /> <br />Check the built in fuel tank where the rubber fuel line attaches to the tank fitting. That fitting is in all probability a "Anti Siphon" valve which is notorious for sticking in a semi closed position. It will be aluminum, about 2" long, and the insides of it will consist of a spring, a ball, and a ball seat. If this valve exists, remove it, knock out those inner components which will convert it to a straight through fitting, then re-install it. Hopefully that cures the problem.
 
O

ob

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Aug 16, 2002
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Re: 1977 evinrude 140hp 2 stroke

After you follow The advise of Mr. Reeves consider replacing the primer bulb as well.They too can be faulty and cause flow problems.
 
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Rick0122

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Joined
May 15, 2004
Messages
2
Re: 1977 evinrude 140hp 2 stroke

The bulb is new, arrow pointing to the engine. on my tank, i have a quick release fitting. like i said , it will run good for a short time. and then just bog down and quit. and the primer bulb is compressed.
 
O

ob

Admiral
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Aug 16, 2002
Messages
6,992
Re: 1977 evinrude 140hp 2 stroke

Then you most definately have a fuel restriction on the fuel tank side(upstream) of the bulb.Pickup tube or as Joe mentioned,the anti-syphon valve of the fuel tank fitting.
 
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