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Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 26284
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
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I can't get my tecumseh hh100 to start i have fire and

Customer Question

I can't get my tecumseh hh100 to start i have fire and compression new rings and made sure the timing is rite
Submitted: 3 months ago.
Category: Small Engine
Expert:  Curtis B. replied 3 months ago.

Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!

Expert:  Curtis B. replied 3 months ago.

What was original problem? What is the compression? What is the valve clearance? You say timing is right? The inner camshaft and crankshaft timing, and the timing key in flywheel??

Expert:  Curtis B. replied 3 months ago.

Will it fire on ether?

Customer: replied 3 months ago.
Won't fire on ether compression and valve clearance was my problem and no I haven't done the flywheel could you tell me more
Expert:  Curtis B. replied 3 months ago.

The outer timing is set by the keyway between the flywheel and the crankshaft. If the key has any damage at all, it throws off the timing and you get a no start. Flywheel needs to be removed , with a small puller, then you can see the keyway. See Flywheel link below.

Customer: replied 3 months ago.
I just had the flywheel off I did not see anything wrong with the key but I will check again to make sure what about if the ignition is wired up wrong even though I still have fired the pug
Expert:  Curtis B. replied 3 months ago.

If it has spark, compression above 70 psi and is in time, it should start!

Expert:  Curtis B. replied 3 months ago.

Flywheel key can have no damage, it needs to be perfect and the flywheel needs to be torqued down when reassembling.

Customer: replied 3 months ago.
The fire seems a little weak what could I try to do about that
Expert:  Curtis B. replied 3 months ago.

The only thing that makes the spark is the coil and the magnet in the flywheel. Try removing the kill wire from the coil and see if spark improves. Kill wire may be grounding spark.

Customer: replied 3 months ago.
I have 30 psi after 1 crank and if I don't reset the gage and try again it goes to 90 the key looked fine all but one little bur and I filed it off
Expert:  Curtis B. replied 3 months ago.

90 psi is good. So is the spark strong? If you put a teaspoon of fuel direct into the spark plug hole, re-install spark plug, will it fire for a few seconds? If not, seems to be that the crankshaft and camshaft timing may be off!

Customer: replied 3 months ago.
The timing is where it is supposed to be unless where I put a different cam in effects that I also broke the ear off of the Governor rod will that affect starting
Expert:  Curtis B. replied 3 months ago.

Governor ear will not affect starting. If the camshaft is not for same series of engine, it will not work

Customer: replied 3 months ago.
Oh okay I bet that is where my problem lies
Expert:  Curtis B. replied 3 months ago.

OK>

Customer: replied 3 months ago.
How would I know if the cam I got is the right one or wrong one
Expert:  Curtis B. replied 3 months ago.

You would have to compare it to the old one.

Customer: replied 3 months ago.
What causes my compression to be so low it has new ring and I grounded the valves last night I only have 30 or 35 PSI right now
Expert:  Curtis B. replied 3 months ago.

It will not run with that low compression. Compression can only leak at head gasket, valves or the piston rings!