Oil Pressure and loud exhaust

[jt71730003]

I have a 2000 Stingray 240 CS, bought it the first week of August. ( I am new to boating) It has a 305 with Fuel injection and a alpha I (I think). I was out last weekend and the exhaust seemed a little louder that usual, almost like a car would sound with a bad muffler. Kicked out a little more exhaust than usual also, to the point where it was coming up into the cockpit. I was under the impression that the exhaust was supposed to come out through the prop, but it seems to be coming out of where the out drive steers left/right. (Forgive me for not knowing the right part name.) Then I noticed a few days later when I took a friend out to try to diagnose the problem that the oil pressure was higher than normal. It was running between 60-80 PSI.

The motor itself sounds fine, oil looks good, end of dipstick and oil cap is not milky, running at a steady 160 degrees. Does anyone have any suggestions before I take it in to get looked at? Also, can someone confirm that the exhaust should come out of the prop vs the top of the leg under the swim platform?

Thanks, John

 

[littlebookworm]

Re: Oil Pressure and loud exhaust

There is a bellows or tube between the outdrive and its mount. It sounds like that bellows has torn, allowing the exhaust gases and water to head upwards instead of downwards. If you tilt the drive all the way up (with the engine off) you should be able to see the exhaust bellows/tube. It's probably shredded or even partially melted. It's not a big job to replace, though that's not very easy if the boat's in the water. Good luck. Hy

 

[windsors03cobra]

Re: Oil Pressure and loud exhaust

Sounds like oil pressure on a low hour motor and normal exhaust coming out of the idle relief ports on each lower side of the transom shield.
Exhaust comes through the prop when it makes enough exhaust pressure, in other words mostly at higher revs.

 

[Friscoboater]

Re: Oil Pressure and loud exhaust

I do not use the bellows any more. I got the tube. it is quite when not planing but really talks when on plane.

 

[jt71730003]

Re: Oil Pressure and loud exhaust

Thanks to all that responded. I ended up having the boat looked at and it was the exhaust bellows that can be replaced at the end of the year. Oil pressure is probably a faulty sensor. Thanks again for your help.

 

[180shabah]

Re: Oil Pressure and loud exhaust

Did you have the ujoint bellows checked? If they fail your repair costs will go up significantly.