Zenoah three bearing?

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15 years 8 months ago #14421 by Mercury94
Zenoah three bearing? was created by Mercury94
Can a RCMK crank case bearing be used in place of the seal on the output end of a Zenoah? If so what benefits would be gained or lost?

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  • Scott
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15 years 8 months ago #14423 by Scott
Replied by Scott on topic Re: Zenoah three bearing?
Have done so for YEARS ... Zenoah has made a double sealed bearing that is factory used in the PU aircraft engine. Yes the DOUBLE sealed rcmk bearing will work fine.

Advantage is a more rigid and better supported crank, less vibration generally ... a win win IMO
2 stroke Engine Tech of 30+ years, Prop tweeker, Chronic tinkerholic, Home of Motor Heads RC Racing Engines ...
8 time NAMBA National 6 lap heat racing record holder.

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15 years 8 months ago #14440 by Mercury94
Replied by Mercury94 on topic Re: Zenoah three bearing?
Would it be possible to use the RCMK brass seal plate?

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15 years 8 months ago - 15 years 8 months ago #14441 by Scott
Replied by Scott on topic Re: Zenoah three bearing?
Mercury94 wrote:

Would it be possible to use the RCMK brass seal plate?


No reason not too .. will fit just fine.
You will however need to shorten collet so it does not contact inner race of outboard bearing once going to 2 bearings on PTO side ;)
2 stroke Engine Tech of 30+ years, Prop tweeker, Chronic tinkerholic, Home of Motor Heads RC Racing Engines ...
8 time NAMBA National 6 lap heat racing record holder.
Last edit: 15 years 8 months ago by Scott.

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15 years 8 months ago #14493 by ian69
Replied by ian69 on topic Re: Zenoah three bearing?
scott will this work on a two bearing hirev quickdraw .

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15 years 8 months ago #14495 by Scott
Replied by Scott on topic Re: Zenoah three bearing?
ian69 wrote:

scott will this work on a two bearing hirev quickdraw .

Pretty sure it will being most of the more current QD's have 4 bearing bottom ends.
If on the older cases with only 2 main bearings, if the PTO end used the big bearing diameter seal it could be replaced by a third sealed bearing most likely.
2 stroke Engine Tech of 30+ years, Prop tweeker, Chronic tinkerholic, Home of Motor Heads RC Racing Engines ...
8 time NAMBA National 6 lap heat racing record holder.

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15 years 8 months ago #14497 by ian69
Replied by ian69 on topic Re: Zenoah three bearing?
thanks scott just checked it's got the small seal .maybe i can get it machined to take the bearing.

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15 years 8 months ago #14498 by Scott
Replied by Scott on topic Re: Zenoah three bearing?
So your saying the crankcase is made so it uses a small seal like used on the MAG side on the PTO side as well ?

If thats the case, then live with it. Not practical or really doable taking the bearings O.D. bore outward to stack a second one along side it.
Just run it as is, your just fine as it is designed.
2 stroke Engine Tech of 30+ years, Prop tweeker, Chronic tinkerholic, Home of Motor Heads RC Racing Engines ...
8 time NAMBA National 6 lap heat racing record holder.

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15 years 8 months ago #14499 by ian69
Replied by ian69 on topic Re: Zenoah three bearing?
sorry it has the the thick seal so it's do able

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