My motor started a ticking sound a few weeks ago. It would do it then quit then do it. Real noticible at idleing. Now it i does it all the time. No performance issues at all runs great. Any clue on what it would be. I hope we don't have to tear it down. Thanks Tim

I'd hook the hose up to the motor and run it in the driveway (Idle in neutral) with the hood off. Try to pinpoint an area where the sound is coming from. Look for any pushed out broken gaskets, leaks and etc. If its interal you'll have to do a teardown. Sometimes fuel injectors can make a ticking noise. Can't remember for shure if the OX66 is carbed or FI. Thought it was FI.

dkf's advice is where I'd start as well.

The OX66 is fuel injected, but not DFI.

marine_man

Sounds like a partially plugged tube that goes to your o2 sensor.