oil presure problem

[freedom charters]

I have a 34 ft baha king cat with two 7.4 2000 mercury motors. one of the engenes drop oil presure to 20 lbs. at a idle and will only goes to 30 lbs at 3100 rpm's is it time for a new motor or what can I do

 

[Gary H NC]

Re: oil presure problem

20 pounds at idle is not really that bad.I would hook a manual gauge up just to be sure thats not the problem.
I'm sure some of the engine pros here will have some input.

by the way,WELCOME TO IBOATS!

 

[Don S]

Re: oil presure problem

Check it with a mechanical gauge like Gary mentioned. You should see a minimum of 30 PSI at 2000 rpm and 7 PSI Minimum at idle.
Did this just suddenly happen or happen after some other work was done on the engine? Like an oil and filter change?

 

[Bondo]

Re: oil presure problem

Ayuh,..... Welcome Aboard,......

The answers to Don's questions will make it easier to give you meaningful Answers.....

Old Motorheads always say that 10lbs. per 1000rpms will suffice for a Chevy,......
But,.... Without some History,..??.....

 

[freedom charters]

Re: oil presure problem

Check it with a mechanical gauge like Gary mentioned. You should see a minimum of 30 PSI at 2000 rpm and 7 PSI Minimum at idle.
Did this just suddenly happen or happen after some other work was done on the engine? Like an oil and filter change?

yep it suddenly happened I lost about 10 lbs.

 

[JustJason]

Re: oil presure problem

Change the oil (obviously check for water/excessive fuel)and recheck it. Make sure your not overfilling.

 

[Bondo]

Re: oil presure problem

or what can I do

Ayuh,..... Alittle more than 1/2 sentence replys might keep Our interest in Your problem........

Did you verify whether the Problem is the Gauge, or the Motor,..??

 

[Don S]

Re: oil presure problem

yep it suddenly happened I lost about 10 lbs.

Run and check the engine with a mechanical gauge BEFORE you start changing things. so you have some base line to go by.
It happened suddenly, but was it during a trip, or after some repairs.
Like Bondo mentioned, give us some help and explain what happened and when, how long, all the good stuff that we can't be there to see.