> > I have a 2000 Ski Centurion Elite V Drive with the 5.7L Mercruiser
> > engine. I have just noticed a ticking sound when the engine is idling
> > in neutral. When I engage the drive (either forward or reverse), the
> > ticking stops.
> > The only ticking that I have ever heard is the lifters. At idle, the
> oil pressure is low. When you give it a bit of gas (putting it in gear)
> the rpm increases a bit, and the pressure goes up, and the ticking
> stops. If you increase the throttle VERY slightly, while the boat is
> still in neutral, does the ticking stop? Is your oil pressure at idle
> very low, say 20 psi?
Doug, thanks for the response. I haven't noticed the oil pressure
being particularly low. I will check this weekend. The sound is very
crisp and doesn't sound mechanical. Though I don't know what a
clicking lifter would sound like. If the sound is related to the
lifters, wouldn't I hear more than one lifter making the noise?
> >Not sure if this is related, but, I notice a week or
> > so ago that the engine was making a "swishing" sound while idling.
> I have heard a similar noise on a Response. When in the water, behind
> the boat. It is from the exhaust being under water, and as the boat
> rocks, part of the exhaust comes out of the water, and it makes a swish
> or a bubbling noise. Just a thought.
I had not consider the exhaust being the source for the sound. It
does sound like millions of exhaust bubbles reaching the surface at
the same time. Having not heard that particular noise in a few weeks
it may be tougher to track down. I do appreciate the thought.