Clicking Noise @4000rpm

[centralemt]

I have a 1996 135hp Alpha One. Well maintained. At high rpm's there is a clicking noise coming from under the engine cover. If it is related, I have noticed a slightly declining drive oil level. Thanks in advance!

 

[Boomyal]

Re: Clicking Noise @4000rpm

Get an automotive stethescope. It could be coming from anywhere.<br /><br /> http://www.brandsonsale.com/ht-0010...e&OVKEY=automotive stethoscope&OVMTC=standard

 

[Don S]

Re: Clicking Noise @4000rpm

Impossible to say.<br />Could be from the engine, or the drive, or even in between. Like Boomyal said, get a stethescope and find out where exactly the noise is coming from, then you can at least check the proper area.<br /><br />If you can tell it's not the engine, pull the drive. Water in the bellows of many an outdrive has caused many a noise from the gimbal bearings and ujoints. Also check the drive oil, it could have water in it.<br />May even be water shutters if the engine has a high rpm miss.

 

[Bondo]

Re: Clicking Noise @4000rpm

Check the Timing,..............<br /><br />Detonation will Destroy the motor in No Time............

 

[centralemt]

Re: Clicking Noise @4000rpm

I apologize for being so vague. I will investigate further and come back here. If it helps, it does not start until I have been running at 4000 rpm for several minutes, and once I power down it goes away. Exhaust perhaps. Thanks for your help.