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Old May 13, 2012, 04:32 AM
Registered User
United States, CA, Mission Viejo
Joined Jun 2011
10 Posts
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OS 40 LA and OS 40 FP

does anyone know if the 40 LA piston and cylinder would work in the 40 FP?
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Old May 13, 2012, 10:55 AM
TigreJohn
United States, CA, Corona
Joined Aug 2008
996 Posts
According to the OS engine parts site (http://www.osengines.com/parts/index.html), The P/L sets have different part numbers. Whether is difference is timing or size is unknown. Maybe somebody else can help. But what is strange is that OS also lists two different P/L part numbers for the LA.
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Old May 13, 2012, 11:02 AM
Registered User
United States, ID, Kuna
Joined Feb 2008
73 Posts
the sleeve wont, the fp has a thicker sleeve, the pistons will, and the cranks interchange just fine
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Old May 13, 2012, 04:38 PM
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United States, IA, Muscatine
Joined Oct 2009
1,592 Posts
Look for an older Magnum 40 bushing engine, it drops right in and you get a chrome bore out of it.
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Old May 31, 2012, 06:13 PM
Registered User
United States, CA, Mission Viejo
Joined Jun 2011
10 Posts
40 LA to 40 FP

thanks for the replys everyone,i think i will try the older 40 Magnum cylinder and piston trick, just because i have one and i will keep an eye open for replacement parts too.thanks again.
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