B & S engine problem

ddd_fredericksJune 11, 2009

My 5 hp pulse jet engine that the fuel sat in for a number of years still has problems after reworking the carburator. It will run until it gets hot then dies, will run on ether only. I think the ignition fails when hot, the dealer wants over $50 for new coil. Has anyone tried using a battery and coil to make an ignition? It would not be much of a problem to run a wire to the points, but don't kown if the timing would be correct?

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If it even has points, which haven't been used for some time. Chances are that if you saw a mower at the curb, Briggs, the coil would work.

    Bookmark   June 11, 2009 at 4:08PM
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You really need to verify you have an ignition problem first. If it will fire at all on ether, chances are the ignition is OK. Loosen the gas cap to make sure there is no vac in the fuel tank. The last year for points on B@S I think is around 1982, so it has been awhile. If it does have points, then you could rig up some sort of coil+battery arrangement as the points control the timing. Coils for those old engines are generally $25 or less. Newer coils (electronic ignition)should retrofit as well, just cut the wire to the points and put the new coil in.

    Bookmark   June 11, 2009 at 5:16PM
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Starting the engine from cold, it ran about 5 minutes and then quit. It will pop using ether but not fire gas, I rebuilt the carburator, so am sure its not the problem. This is an all aluminum engine that has been re-ringed once already so don't want to spend anymore on it. It is on a wood splitter and I have about a cord of storm damage wood to split, if I could wire it to run with a battery and a car coil and run a wire to the breaker points it would be the cheapest. I don't want to spend the time trying it if the timing would be incorrect.

    Bookmark   June 11, 2009 at 6:44PM
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canguy(British Columbia)

If you try running 12 volts from a car coil to the existing points/condenser you will fry them. If you are convinced ignition is the issue, install a 397358 Manetron coil and be done with it.

    Bookmark   June 11, 2009 at 11:34PM
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I have an LT150 JOHN DEERE and the engine has a surge at high pwr. I cleaned the carb and that improved it a little bit but the problem still persists. Any ideas out there to try something new?

    Bookmark   March 31, 2010 at 9:31AM
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