yea, but The advisory against prop extensions was based on experience with the original un-modified pulley bearing conversions.
To my knowledge, there have been no crank failures with the ForceOne or the extended Revmaster crankshaft flange Additionally, Revmaster sells 3" and 4” extensions for these engines and has not had issue with them. Just as important (maybe more so), the advisory to remove the pulley bearing oil flow restrictor post dates the recommendation against prop hub extensions. It looked like a lot of (maybe all of) the crank failures were due to oil starvation of the pulley bearing. Finally, we now have the option (i think requirement) to dynamically balance the full installation. All this just to say that yes, any poorly installed, unbalanced installation is a potential disaster, but I think the prohibition against extensions is obsolete. > On May 26, 2022, at 4:26 PM, shafferj45...@twc.com wrote: > > I thought the exact same thing, Mark. > From: John Shaffer : > To Mark Langford and Jeff Scott. > > Offline - Wow....that prop extension is a broken crankshaft waiting to > happen! > > > > attached photo of engine. > > Jeff Scott > > Arkansas Ozarks. > > jscott.pla...@gmx.com > > -- > KRnet mailing list > KRnet@list.krnet.org > https://list.krnet.org/mailman/listinfo/krnet > /> <https://list.krnet.org/mailman/listinfo/krnet%3Cbr>-- > KRnet mailing list > KRnet@list.krnet.org > https://list.krnet.org/mailman/listinfo/krnet
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