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Replaced the ZF5 Hurth with a PRM60 with new Damper plate on WHITS END hull #282. Prior to replacement had a bad vibe at idle <900 rpm so had turned up idle to 1100 for smooth running. Now bad vibe is even more pronounced at 1100-1400!
I removed, cleaned, painted engine mounts and realigned engine to < .003". Cutlass bearing is 4 yrs old. Prop and hull clean.
I understand that 3 cyl universal engine has a harmonic vibe that can transmit to hull via mounts.
Anyone had similar experience? Can moving engine mounts slightly change Harmonic?
Replaced the ZF5 Hurth with a PRM60 with new Damper plate on WHITS END hull #282. Prior to replacement had a bad vibe at idle <900 rpm so had turned up idle to 1100 for smooth running. Now bad vibe is even more pronounced at 1100-1400!
I removed, cleaned, painted engine mounts and realigned engine to < .003". Cutlass bearing is 4 yrs old. Prop and hull clean.
I understand that 3 cyl universal engine has a harmonic vibe that can transmit to hull via mounts.
Anyone had similar experience? Can moving engine mounts slightly change Harmonic?