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Huskie

Small engine guys-Mantis

7 posts in this topic

I bought an older mantis tiller, had the carb cleaned out and it ran great. Lately it will run for a few minutes and then it bogs down and dies. The sticker on the mantis lists the fuel mix as 50-1, however the manual which I downloaded with the serial number states 32-1, which I have used. It is a 1980's model. Am I using a mix that is too rich and need the carb looked at again? Any ideas. Thanks

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Diaphragm carb. Bogs: Start with high speed adjustment.

Did you put new diaphragms in? The fuel pump is part of those diaphragms.

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New diaphragms were not put in, didn't have them. Will probably have to have that done. I'll check the manual and work with the high speed adjustment first, thanks.

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I've been using a synthetic 2-cycle oil that you can use to replace gas:oil ratios from 20:1 to 50:1. Now only one premix can for the chainsaw, weed whip, ice auger, etc. I get it at Fleet Farm. It is by the chainsaws and also the oil aisle.

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If you use Amsoil Saber, you run 100:1 for every small engine.

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Another thing to look for is carbon buildup on the exhaust port.

Take the muffler off and make sure it's not completely blocked off.

The same situation will arise with my trimmers, they run, until they're hot, then the exhaust can't escape as fast and they'll start to bog, or even die.

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Rich oil mixture is probably part of your problem, but you probably have a carburetor problem - several other posts here.

Yes, the same AMSOIL Saber Professional that you use in your auger - and good for all other air cooled 2-cycle pre-mix engines too, can be used at 100-1 lean oil mix.

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