bouncing needle or something worse?

[mindenpilot]

The pucker factor is starting to increase a little.
Since I've owned N7966L (65 hours), I've been carefully watching the
engine.
It's always consumed a lot of oil, and I've been plugging the leaks
as I find them. However, it has always run really strong.

Last weekend, I flew about 4 hours. On climbout the RPM
was "bouncing" a few hundred RPM. Once level, no more bouncing.
I'm wondering if this is something wrong with the instrument or an
indication of something wrong with the engine. I didn't notice the
engine behaving strangely. It climbed normally. It may have been
wind/turbulence etc., but I *thought* I felt a single prop-bump, but
I was already on edge because of the RPM.

Flew again, and it's still bouncing. It's still performing well,
though. Any ideas? Thinks I could take a quick look at to help
diagnose?

Oh yeah, one new cylinder, comps high 60's to mid 70's, 1100 SMOH on
the IO-360.

Thanks,

Adam
N7966L
Super III




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[Allen]

If it is a cable drive(mine is) I suggest lubing the cable. Fixed my
RPM bounce. Just a thought.
Allen
Down Mexico Way
---



In musketeermail@yahoogroups.com, "Adam" <weissfamily97@c...> wrote:
> The pucker factor is starting to increase a little.
> Since I've owned N7966L (65 hours), I've been carefully watching
the
> engine.
> It's always consumed a lot of oil, and I've been plugging the leaks
> as I find them. However, it has always run really strong.
>
> Last weekend, I flew about 4 hours. On climbout the RPM
> was "bouncing" a few hundred RPM. Once level, no more bouncing.
> I'm wondering if this is something wrong with the instrument or an
> indication of something wrong with the engine. I didn't notice the
> engine behaving strangely. It climbed normally. It may have been
> wind/turbulence etc., but I *thought* I felt a single prop-bump,
but
> I was already on edge because of the RPM.
>
> Flew again, and it's still bouncing. It's still performing well,
> though. Any ideas? Thinks I could take a quick look at to help
> diagnose?
>
> Oh yeah, one new cylinder, comps high 60's to mid 70's, 1100 SMOH
on
> the IO-360.
>
> Thanks,
>
> Adam
> N7966L
> Super III




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