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Old May 13, 2012, 05:32 AM
jsan2385 is offline
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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, 11:55 AM
jjkupinski is offline
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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.
Old May 13, 2012, 12:02 PM
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the sleeve wont, the fp has a thicker sleeve, the pistons will, and the cranks interchange just fine
Old May 13, 2012, 05:38 PM
jeffie8696 is offline
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Look for an older Magnum 40 bushing engine, it drops right in and you get a chrome bore out of it.
Old May 31, 2012, 07:13 PM
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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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