Tenacious maintenance/Repairs

[yellowfin1]

Ok, I am getting older and maybe the problem is my hearing. Would either of you (Mike/Jeff) recommend running the boat on the water while the air filter cover is removed just to observe if the turbines are spinning?

[NoSlack]

It should be spinning at idle in the driveway.

Mike

[DOGHOUSE26]

I don't know if I ever heard my turbo spooling up, but I could always feel the boost when it kicked in @ 26-2700RPM on my tach. I think you can easily hear them on a Cummins motor though; everytime Shawn Trowbridge pulls up to the bait dock in his Legend I hear his turbos sing which sounds pretty cool. I have a 400HP CAT C9 in my motorhome and I haven't heard the turbo in it either.

[DOGHOUSE26]

Ok, I am getting older and maybe the problem is my hearing. Would either of you (Mike/Jeff) recommend running the boat on the water while the air filter cover is removed just to observe if the turbines are spinning?

I don't see any problems with that, as Mike says it should be spinning @ idle.

[Time Out]

Yanmar must be different than Volvo I can hear my turbo its a high pitch wine thats lowder than the motor.

Russ

[yellowfin1]

Russ...whiner.

Usually my turbo is very noticable and whines quite loudly too.

[yellowfin1]

Well,

I removed the air filter, started her up in the driveway and observed the turbo spinning. Additionally, as I increased the RPMs it spun faster. Maybe it really is just my hearing going bad.

[Roper1]

when in doubt, change your filters. If you are letting your filters show major clogging or drop in rpm's fork out for a half dozen filters and change every other trip.

RPM windup is noticeable on a ad41 if you know what to listen for. It does not sound like a race car. If your tack will peg out at 3900, engine runs cool and your are able to plane, top out around 24ish loaaded, i would say your boats runs fine.

Go out and get um
John