Chirping sound from 496?
 

Just curious if anyone else has this or knows what it is. Must not be too serious, its been doing it as long as I can remember. Sounds like loud fast cricket chirping, Belt squeal?
I open the hatch when I start it, Its not loud enough to hear when the hatch is closed. Thanks, JC

Re: Chirping sound from 496?
 

I have not heard the noise. I do hear a whistle sound at around 2800 RPMs though. BTW, How fast is your Fountain with the 496HO?

Re: Chirping sound from 496?
 

Yep. I get it out of one of my motors. Sounds almost a like a pulley or a tensioner. Only at idle though, and I can hear it through the hatch until I give it a little throttle for the no-wake.

The other 496HO noise I get is the swoosh suction sound when going from fast idle to standing idle.

Re: Chirping sound from 496?
 

ok here is what I found from my chirping engine..... lower flywheel housing cover plate, (sheet metal), they are held there with 1/4 in bolts that come loose and fall into the bilge and the plate is rubing against the flywheel, I think the problem is they use a cork gasket on these and the bolts lose Tq. over time and fall out

Re: Chirping sound from 496?
 

Interesting. I'll have to closely inspect mine....Don't like the thought of things just falling off motors no matter how insignificant they may be.

Re: Chirping sound from 496?
 

Had a chirp on one of my engines. Squirted some wd40 on the belt tensioner bearing to confirm it was the problem. Chirp went away for abourt 30 seconds. Replaced tensioner.
ed

Re: Chirping sound from 496?
 

DaveM, 69gps best to date, this year in may full fuel just me. I'll check the belt tensioner and cover plate bolts and report. Thanks for the help guys, the sucking sound is normal. JC