View Full Version : Tec HM80


2006Rich
11-24-2006, 09:04 PM
Hi guys. Noobie to the forum here :wave: .
I have an Ariens snowblower with an HM80 on it. Can't get it to run well. I rebuitl the carb, and it still floods out and is a bear to start. Compression is only 45lbs. I checked the valve clearnce (both .010?) The top of the piston is wet and the plug gets fouled quickly. I pulled the piston today and everything looks OK. The ring end gap is .025 on all 3. What should I check next?
Thanks Rich :thumbsup:

bsman
11-24-2006, 11:28 PM
i would start at compression, way too low. Flooding could be the cause of a stuck bowl on improper seating somewhere on it.

2006Rich
11-24-2006, 11:32 PM
Does this HM80 have compression release? I have heard both. Also today when I took the camshaft out , it has some type of spring type cam on the end of it.
ThanksRich

bobotech
11-25-2006, 12:34 AM
Does it use a standard head gasket? Could that be bad or just not torqued down properly?

bugman
11-25-2006, 04:04 AM
Valve clearance sounds in the ballpark...... BUT, how well do the seats look? back of valves?
And wet piston..... oil, or gas wet?