Glow Engines Discuss RC glow engines

O.s. engines parts interchangeability?

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Old 09-14-2019, 06:58 AM
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vuuli312
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Default O.s. engines parts interchangeability?

Hi
I have a few o.s. max .77 vr engines, marine and ducted fan.I am in a position to acquire a o.s
max .81 vrm boat engine.I was wondering is there any interchangeability between the 2 engines, specifically the piston & sleeve.Thanks
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Old 09-14-2019, 07:00 PM
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the Wasp
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I can't find the 77's manual. so my guess is>, the 81 is a larger engine so it has ether a longer stroke or a larger bore, I'm betting the 81 has a larger bore. I can only believe the pistons and liners will not interchange, because if the 81's bore is larger the liners will not interchange because the bore in the 81's case will be larger. and, if the stroke is different most likely the porting is different.

your best luck would be to find a RC Racing Boat club on the Net and Email them and ask if they can direct you to some one that can help.

all my glow boat engines were OPS 45 & 90 inboard and K&B 45 outboards, good luck

Jim
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