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Jack of all trades, master of none.
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1,133 Posts
Got an 18 HP K361 (1980). Replaced the head gasket cuz it was sucking air. Now i's backfiring out the carb. Timing marks appear to line up on crank and cam, but points open about 20 deg. soon.
 

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Fixer of Broken junk
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5,018 Posts
1st make sure the head bolts are torqued to 30-35ft lbs Head torque does affect Valve clearances on these.

2nd Both valves get adjusted to .005 or .013mm Cold K361 has adjustable tappets on the rocker arms.This is unique to the K361.

3rd Points to .020

Many people dislike the K361 because the Valve seats are known to drop out of the head.This happens if the cooling fins on the head become clogged up or the engine runs Lean for any amount of time and overheats.
 

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Jack of all trades, master of none.
Joined
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1,133 Posts
Check your compression you'll be able to tell if you have a valve problem. Or you can put some air in the cylinder at tdc
 
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