Anyone heard of boat angle causing oil pressure problems?
 

Hey guys, I just noticed I'm loosing oil pressure when I get to 3800-4000 rpms, I'm going from 40psi down to 20psi, when I drop down it immediately goes back to 40psi. I've read lots of different possible causes. The one that most are saying is the problem is the boat angle. Anyone heard of this ?

Any input will be greatly appreciated
Thanks

It sounds like your oil level is too high and the oil pump is sucking air at high rpm. And no, the boat angle is not the problem, if it were when you get on plane your problem would happen.

Ditto! The oil sloshes up and hits the crank which whips it full of air, many of us run windage trays to eliminate the issue.

Funny, should I remove or let it burn, my boat loves oil?
I should mention the stick says full or a tad below,

Definitely sounds like a windage issue caused either by a poor windage tray design or high oil level. The higher oil level could be caused by an increased engine angle. That will cause the oil to pile up at the rear of the oil pan.

Is this a new problem? Is this the first time it has been run or did this problem just arise?
Eddie

your oil pan is rear sump, not front sump by weird chance.

I'm not sure, ill take a look

Eddie, its been happening for a bit.

Just added a 1/4 of oil before I ran it, only happens when I'm over 3800 to 4000RPMs, but instantly comes back! When I throttle down.

I may have over filled it, did it on the trailer in my drive way!

oil pick up may have fallen off the pump or some issue with it...engine ever been out ?

Out 65hrs ago but not since!

I was just thinking the same thing. I know everyone is saying "too much oil" but try putting an extra qt or even 2qts in and see what happens. If the pickup has fallen off, the extra qt of oil should help the problem some. Dont run it too long like that, just long enough to see if it makes a difference.

Bill Koustenis
Advanced Automotive Machine
Waldorf Md

Does the motor have to be pulled to check the pick up? Also, if I add a quart or two will I have to remove some if it is the problem or not ?

Appreciate all the info!

What about a bigger oil cooler, the boat came from Utah where it is much cooler weather, and the water is much cooler as well?

The engine might not have to be pulled depending on how easily you can get to the oil drain plug. If you can get to the drain plug and remove it, you can use a thin screw driver or a bent piece of metal coat hanger to "feel" around in the oil pan and see if the pickup is laying in the bottom of the pan.

If you add oil to the engine for the test you most certainly have to remove the extra oil before running the boat for any long periods.

Either way, I think you need to get to the bottom of the problem before running the engine much more. You can do serious ($$$$$) damage if you dont find the problem.

One other thing that I am not sure if anyone else mentioned . . . have you tried installing a mechanical pressure gauge on the engine just on the way outside possibility that the gauge is the problem, assuming it is an electrical gauge.

I dont think the oil cooler has anything to do with it.

I am not sure if I can get to it, I have pics of the motor on here, its under q&a 25 outlaw 675 sci help, If I run the boat normal the psi stays at 40, when I get on it it drops to 25 to 20 butcomes right back when I get out of it, i thought it was just getting hot and thinning out! I will hook up a mechanical gauge if not difficult and check it!

I really appreciate your help!

Maybe you can help me with my prop issue, have a 26 bravo lab now and thinking about a 28 lab or non lab, I think it will work better for my set up.

When checking oil levels, what is considered level? Check it when the boats on the trailer and the trailer is level or check it in the water?

I consider on the trailer to be level as that is the approx attitude the boat runs at on plane.

I believe it should be checked in the water, the motor should be level in calm water, I've read several threads and most say the same thing,