Antares100

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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,

Bax

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Rear Needle.

Antares100

My Feedback: (12)

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?

Bax

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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.

Antares100

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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.

Bax

My Feedback: (11)

Yes, it should be broken-in with the needle just lean of the point where the engine stops running in 4-cycle mode.

Antares100

My Feedback: (12)

Thanks, Bax!