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Unused os max 45fsr-need break-in-is it ABC?

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Unused os max 45fsr-need break-in-is it ABC?

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Old 07-24-2003, 03:33 PM
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Balin
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Default Unused os max 45fsr-need break-in-is it ABC?
Is the os max 45fsr an abc engine. I need to know before I break it in. Is there any way to tell by looking at it? I can't find any info on the os site other than it has a vintage of 1978-1980. When did Os start making ABC

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Old 07-24-2003, 05:38 PM
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Default Unused os max 45fsr-need break-in-is it ABC?
The O.S. Max .45 FSR was made in both a ringed and non-ringed version. You'll have to examine your's to see if it has a piston ring. You can see the piston by looking through the exhaust port.
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Old 07-24-2003, 07:24 PM
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Default Unused os max 45fsr-need break-in-is it ABC?
Bax,
It is definitely non-ringed. Is it ABC or equivalent as far as break-in goes?

balin
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Old 07-24-2003, 08:02 PM
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Default Unused os max 45fsr-need break-in-is it ABC?
Being non-ringed, break it in as if it were an ABC. You use the same procedure for true ABC engines, and the O.S. ABN types.
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