O.T. 50hp Everrude just stops

Pajamafied John · May 22, 2012

Went fishing with the family and my 1981 everrude was running perfect. after running wide open for about 5 minutes it suddenly dropped down to very rough idle speed then died. it restarted with a little difficulty at idle throttle setting and then ran perfect again.i'm thinking the fuel pump is getting weak. it is original to the motor. Any thoughts? Replaced both coil packs bout 6 years ago.

Anonymous-0 · May 22, 2012

I would check fuel tank for something floating around in fuel tank first.

Ray in NJ · May 22, 2012

Check ground wires on ignition system also

Texasmark1 · May 22, 2012

I'd go over to www.iboats.com and look in the engine repair section of their Forums under Johnny-Rude and you will have thousands of answers.

From your comments it seems it's a fuel starvation problem. 1st thing would be a clogged fuel filter. I just had to replace my fuel line and bulb, and new filter on a 10 year old rig that I have taken due care of, due to OEM fuel line scale that developed in the line.....thought it was a tank problem but turned out being the line itself. The scale was most prevelant at the inlet to the bulb and the filter was full of it.

Other thing could be a damaged fuel pump diaphragm. Using the squeeze bulb to artificially supply the engine with fuel would tell you if the pump was the problem.

Last would be a clogged fuel linlet in tank or tank vent not venting. A collapsed bulb would tell you that your engine is sucking against a closed fuel source and can't get air to replace the fuel coming out of the tank, forming a vacuum.

HTH,
Mark

WAYNE-N-TX · May 22, 2012

Mine did that once and the problem was the high speed jets were clogged, at least that is what I was told. He said that as long as I was going slow, no problem, but when you give the gas, not enough oil. The pistons get hot and swell just a little causing it to die, let it cool and it'll start again. When he tore it down, I had scored 2 pistons.

641Dave · May 22, 2012

I had an old Mercury and it did that.

It had the two rubber diaphragm fuel pumps mounted on the side of the motor and one of them broke.

I'm not sure if your evinrude is the same. (Ha, just saw how you spelled it. lol. ), but if it is, it should be easy to trace the fuel line up to that and I think it's two bolts to pull off to check the diaphragms.

If none of the above it is, try blowing back up the fuel line into the tank and see if it runs better for a while.

Cheap checks to element some headaches.

Revredneck · May 22, 2012

All the suggestions here are good and worth a look. Don't overlook the venting of the fuel tank and the bowl of the carburetor(s). There may be some dirt or debris in a small vent passage, causing it to starve for fuel.
Good Luck and God Bless

Anonymous-0 · May 22, 2012

Water in the fuel. I've seen it many times.

Inno · May 22, 2012

If the fuel pump is orig. then it sure couldn't hurt to rebuild it. Also clean the carb at the same time.

Pajamafied John · May 22, 2012

Thanks to everyone. More insight is always helpful

O.T. 50hp Everrude just stops

Pajamafied John

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Anonymous-0

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Ray in NJ

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Texasmark1

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WAYNE-N-TX

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641Dave

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Revredneck

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Anonymous-0

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Inno

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Pajamafied John

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