Type LB Hit and Miss

Jake Wuebben · Feb 15, 2009

I am restoring a 1940's International Harvester Type LB stationary engine. After waiting for parts for three weeks I am finally putting it back together, but I'm stuck right now because I need to find the torque specs of the head, connecting rod, and the side cover as well as anything else that needs torqued down. Can anybody tell the specs or where to find them?

Jim Becker · Feb 15, 2009

Nobody owned a torque wrench when that thing was designed. If you have to use a torque wrench, get figures out of a standard table of torques by bolt size.

sgtbull · Feb 16, 2009

Don't want to burst your bubble, and maybe it was just a terminology slip, but an LB is a throttle governed engine, not a hit and miss.... if you are hoping for that "pop.,whooosh whooosh whooosh whooosp Pop" sound, you won't get that. It fires every other revolution. I didn't really understand the difference when I first got into old engines, and found myself in a similar position.. thinking an LA was a "hit and miss", until it was explained to me.

A true hit and miss typically has a mechanism to hold a valve open while the engine coasts, to reduce compression resistance, then closes the valve when the engine drops below a set rpm.
The previous poster was also correct. Don't get hung up about torque values on these old engines. They were designed to be taken apart w/ minimal tools and skills, and put back together w/ the same. The original manuals on old engines often explained complete disassembly for service by the OWNER, not a mechanic... and I don't ever recall seeing the words "torque wrench" in any of 'em.
The LB is still a fun engine and is a good starter engine for a fun hobby. Good luck and enjoy.

Type LB Hit and Miss

Jake Wuebben

New User

Jim Becker

Well-known Member

sgtbull

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