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Os 60fp (rn)

Old 12-05-2014, 07:57 AM
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Antares100
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Default Os 60fp (rn)

Hi All,
Just a quick question, what does the RN stand for in a 60FP (RN). I am unable to find any information on this suffix.
Thanks in advance,
Old 12-05-2014, 08:27 AM
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Rear Needle.
Old 12-05-2014, 09:21 AM
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LOL, sorry Bax, should have figured that out myself. Just was reading on proper break-in and was trying to make sure it was basically just a 60 FP. Been reading a lot of conflicting views. Does this have a tapered cylander?
Old 12-08-2014, 07:03 AM
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The rear-needle version of the O.S. Max .60 FP did have the ABN-type of piston/cylinder assembly, which means that it does have the tapered cylinder liner.
Old 12-08-2014, 08:24 AM
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And so, based on that it should NOT be broken in using the 4-stroke method, but at high speed and a little rich?
Thanks again.
Old 12-09-2014, 07:51 AM
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Yes, it should be broken-in with the needle just lean of the point where the engine stops running in 4-cycle mode.
Old 12-10-2014, 05:50 AM
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Thanks, Bax!

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