Tecumseh LH195SP Conks out under Load

[Dale_W]

Tecumseh LH195SP SPEC 67513D mounted on a White Outdoor products snow blower.

I brought this home for a buddy to repair the recoil and electric starters. Those were easy.

When testing, it starts nice, runs nice (no hunting). But when I put it into a pile of snow, the engine conks out.

I would strongly suspect this engine has never been monkeyed with, so the governor is still set from factory. It will speed up the engine if I move it by hand.

Any thoughts? As I write this, I am thinking...need to try a new spark plug....

Any other ideas?

Thank you much.

[bgsengine]

Main Jet or idle transition passages may be gummed up - at full throttle no load they pretty much run off the idle circuit. Try opening the throttle wider (past governed RPM) a bit manually (or "snap throttle") and see if it conks out - if it does try the same but slowly and gradually and if it still conks out, suspect main jet if not suspect idle transition passages in carb.

if it does not die out then maybe a had gasket, valve or compression problem

[KE4AVB]

if it does not die out then maybe a had gasket, valve or compression problem

Hmmm, Bad typing I guess but never heard of a had gasket. Is it the same as "Had fuel."?

But seriously, yes I have seen a few plugs to fail only under heavy loads. And BGS suggests can be a carburetor being dirty.

[Dale_W]

Follow Up

BGS, thank you for the testing procedure. Stumble it did.

I gave the carburetor a good cleaning, and the engine runs just fine now.

Our wonderful ethanol has done it's dirty work to this carb. I'll need to be ordering up a fuel line and bowl gasket.

Thank you both for sharing your knowledge and helping get this little snow blower running good again.

Dale