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Antique Gas Engine Discussion Meet collectors of hit and miss engines, ask questions about collecting, restoring and showing antique flywheel engines.

Antique Gas Engine Discussion

lauson crankshaft

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Old 06-19-2005, 08:20:11 AM
Larry Harding Larry Harding is offline
Join Date: Feb 2005
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Default lauson crankshaft

i have a 2 1/2 h p john lauson model d that i bought 10 or more years ago. it sat for a long time because the timing gears had rusted the teeth off due to water standing in the sump. about two years ago i ordered some new boston gears and macnined them to fit. ever since this has been one of rhe easiest cranking best running engines i have. at a show last week it got hard to crank and i couldn't get the governor to set the way i wanted. suddenly it began to knock. when i shut it down i found the crankshaft had broken into at the timing side end of the crankpin. has anyone ever seen this happen? i know i supported the crank while putting on the timing gear and it has run for over two years. where can i find a crank to fit? if worse comes to worse i suppose i could make built up crank like is done on model engines. any suggestions?
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