Carburetor on Neptune mighty mite

[kpimpz]

I was wondering if anybody knows about the issue of I put my motor in the water to go fishing and it won’t run and I take it out of the water it runs I don’t know if it’s my carburetor or what do I need to do to my carburetor to make it get more gas to the for more horsepower i’ve cleaned the carburetor a couple different times I don’t know what I missing I’ve adjusted everything and I can’t get it to run in the water

[dave-bernard]

How is the compression ???????

[frankr]

quote Kpimpz:

I was wondering if anybody knows about the issue of I put my motor in the water to go fishing and it won’t run and I take it out of the water it runs I don’t know if it’s my carburetor or what do I need to do to my carburetor to make it get more gas to the for more horsepower i’ve cleaned the carburetor a couple different times I don’t know what I missing I’ve adjusted everything and I can’t get it to run in the water

I’ll try to be polite here, but I gotta say you probably are barking up the wrong tree when suspecting the carburetor. Very true though, if it is not adjusted properly or at least somewhere close, it won’t run.

[jcrigan]

If the crankcase bushings are worn, air will bypass the carb through the bushings. Grab hold of the flywheel and move it from side to side to see if there is any movement or slop. There shouldn’ t be any there. You may try as Gary suggested and use a mixture of 40 weight oil in place of outboard oil. That’s 8 ounces oil to a gallon of gas.

[kpimpz]

the compression Is good

[thecoinbox]

I have a similar problem with one of my 500’s. In a water tank with the prop off, she runs fine. Put the prop on and she will barely start. Haven’t done a compression test yet but it all points to it.

[thecoinbox]

The problem turned out to be the head gasket. It allowed water to enter the combustion chamber. New head gasket and she runs like a champ.

[jcrigan]

Good to know it was something as simple as that. By the way, where did you get the head gasket?

[Tubs]

A "Boathouse Repair" is one that done without having tools or the skills to do it properly.

• This reply was modified 6 years, 7 months ago by Tubs.
• This reply was modified 4 years, 4 months ago by Tubs.

[thecoinbox]

I got the head gaskets from Steve Andres (Neptune Ned). These are for an older model (5 bolt holes vs 3) but with a little modification, they work just fine. Btw…Doug Penn sold his entire inventory to Steve.

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