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Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 26530
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
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I have a tecumseh hh100 I ordered standard rings and broke

Customer Question

I have a tecumseh hh100 I ordered standard rings and broke them putting them on later to notice the top of piston was stamped .020 . Do I need os rings even tho the bore measures 3 1/4 instead of 3 5/16 I don't know what I need thanks
Submitted: 5 months ago.
Category: Small Engine
Expert:  Curtis B. replied 5 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 5 months ago.

How are you measuring the bore and piston? Do you have micrometer. With piston marked .020 , I think you need the .020 over rings.

Customer: replied 5 months ago.
Would you go with os rings even tho bore is supposed to be 3 5/16 and ithe only 3 1/4 and the .020 has me confused on the piston
Expert:  Curtis B. replied 5 months ago.

Yes, i would go with the .020 rings and check the ring end gap before installing them on the piston.

Customer: replied 5 months ago.
OK what is satisfactory clearance on ring end gap
Expert:  Curtis B. replied 5 months ago.

less than .015 inch.

Customer: replied 5 months ago.
I have also ported and polished the in and exhaust and shaved the head just a bit and made Chambers bigger was this a mistake
Expert:  Curtis B. replied 5 months ago.

It won't hurt!

Customer: replied 5 months ago.
Is there anything else simple u could recommend to give more power this is just a toy it won't be worked
Expert:  Curtis B. replied 5 months ago.

No, sorry, i'm pretty much stock guy!

Customer: replied 5 months ago.
Okay thanks for your help
Expert:  Curtis B. replied 5 months ago.

Thank you, ***** ***** to close and get me credit!

Customer: replied 5 months ago.
I will if need be can I get back to you
Expert:  Curtis B. replied 5 months ago.

Yes, use the link in your email to get back.

Expert:  Curtis B. replied 5 months ago.

Did you get your new rings?

Customer: replied 5 months ago.
Yea the moter is together I have spark but only about 35 lbs of compression and will not start what do you think
Expert:  Curtis B. replied 5 months ago.

Valves have clearance? What did the ring gap turn out to be? With low compression either valves are leaking, or the rings!

Customer: replied 5 months ago.
How much valve clearance and ring end Gap is 15000 could a blown head gasket or bad head cause the problem I used the old gasket
Expert:  Curtis B. replied 5 months ago.

.015 end gap should work. A head gasket or warped head will let compression leak!!

Customer: replied 5 months ago.
How much valve clearance do I need and it is also wet around the head gasket I have a used head on order a new gasket what do you think
Expert:  Curtis B. replied 5 months ago.

.008 intake and .012 inch on the exhaust valves. Head gasket may need to be changed.

Customer: replied 5 months ago.
My valve clearance was 10 and 20 how much difference will that make
Expert:  Curtis B. replied 5 months ago.

It will not affect compression!

Customer: replied 5 months ago.
OK thanks for your help
Expert:  Curtis B. replied 5 months ago.

Thank you!

Customer: replied 5 months ago.
I found out exhaust valve clearance is .026 how bad is that
Expert:  Curtis B. replied 5 months ago.

You sure the valve is closing? That is a lot of clearance, but would not affect compression unless the valve is not closing completely.

Customer: replied 5 months ago.
I'm pretty sure it is closing because I've done a pressure test no blow by how much clearance will that affect me
Expert:  Curtis B. replied 5 months ago.

Would be hard to start, and would make lots of noise.

Customer: replied 5 months ago.
Internal noise or out the exhaust
Expert:  Curtis B. replied 5 months ago.

Valve clicking noise.

Customer: replied 5 months ago.
I put a different cam in it would that make any difference in the timing and I broke the ear off the end of governor rod but timing is rite
Customer: replied 5 months ago.
Does the governor gear have to be in time
Expert:  Curtis B. replied 5 months ago.

Did you compare the two cam gears?

Customer: replied 5 months ago.
No but I am going to if they are different how would I know where to set the new one and also what do you think about the governor
Expert:  Curtis B. replied 5 months ago.

Where did the camshaft come from? What engine? I'm not sure what part of governor is broken.??

Customer: replied 5 months ago.
I ordered the game it is used it came out of another Tecumseh hh100 I just compared them and they are the same the part on the governor it's broke is the part that sticks to the cover plate the end of it
Expert:  Curtis B. replied 5 months ago.

Then it should start!