No spark, checklist

Discussion in 'Mechanic and Repair' started by Kkane97, Jul 6, 2012.

  1. Kkane97

    Kkane97 LawnSite Senior Member
    Messages: 657

    I have a 3.5 tecumseh engine model: H35-45614S and as of now after rebuilding the engine, I have no spark for the engine. What would some of you guys start with when checking for no spark? ie. grounded wires ect? Any help would be great pics available upon request

    Here is the engine after polishing the whole thing down to bare metal, priming and painting with rustoleum engine enamel just no spark :cry:

    (air filter housing and carb havent been painted yet [brand new])

  2. Patriot Services

    Patriot Services LawnSite Fanatic
    Messages: 14,506

    That's a purty paperweight. Simple ignition system. Make sure there isn't a grounding wire. Check the coil gap. Inspect the magnet. Did it run before you tore it down?
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  3. Kkane97

    Kkane97 LawnSite Senior Member
    Messages: 657

    It ran once before I tore it down... my their is preignition from starting fluid was the culprit of the cracked piston so that got replaced along with the necessary things...piston rings ect
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  4. Kkane97

    Kkane97 LawnSite Senior Member
    Messages: 657

    I have had the worst luck finding a manual on this motor... but I imagine that the majority of small engines use the same gap, what should the gap be?
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  5. pugs

    pugs LawnSite Gold Member
    Messages: 3,025

    Step 1: disconnect ground wire and check for spark with a spark tester. If no spark proceed to step 2.

    Step 2: Replace coil.
  6. dutch1

    dutch1 LawnSite Silver Member
    from Jayhawk
    Messages: 2,249

    Is it possible that this is a points/condensor ignition? If it is, you may want to consider replacing both since you're rebuilding it. Points gap is .020". If the coil is inside the flywheel, to gap the coil properly requires a Tecumseh tool to do so. On the other hand, it's possible my memory isn't too good.
  7. Kkane97

    Kkane97 LawnSite Senior Member
    Messages: 657

    Thanks guys for the help, I just ran out side and snagged a coil from anther tecumseh engine in my yard and put that on there, I just made a thread for the rebuild, and all my problems with it here Thread

    my problemo now is compression :dizzy:

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