| Author |
Message |
    
Barry Webber
New member
Username: barry_w
Post Number: 1
Registered: 05-2008
| | Posted on Sunday, May 11, 2008 - 07:00 pm: | 
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I have a 2004 Formula 370SS with twin Merc 496 MAG'S. Since my last oil change my port engine oil pessure drops from 40 psi to 20 psi after running at 3400 rpm's for about 15 seconds. When the pressure drops the alarm sounds. Immediately upon pulling the throttles back to idle the oil pressure jumps back up to 40psi and the alarm stops. The dipstick shows the oil level at the high end of the "ok" range. Any suggestions? |
Bt Doctur
Advanced Member
Username: bt_doctur
Post Number: 289
Registered: 06-2006
| | Posted on Sunday, May 11, 2008 - 07:21 pm: |
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Are the motors stock? A Hi-Volume pump could cause it.Sucks all the oil from the stock capacity oil pan. |
Barry Webber
New member
Username: barry_w
Post Number: 2
Registered: 05-2008
| | Posted on Sunday, May 11, 2008 - 07:59 pm: |
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They are stock HO's. The 425 HP version. We have a lot of no wake zones here in South Florida so they do a lot of idling. |
Bt Doctur
Advanced Member
Username: bt_doctur
Post Number: 297
Registered: 06-2006
| | Posted on Sunday, May 11, 2008 - 08:01 pm: |
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When /if you changed the oil , how much was put in disregarding the dip stick.and do you have the remote oil filter setup.
Bad sensor, check actual pressure with a mech. type gauge. |
Barry Webber
New member
Username: barry_w
Post Number: 3
Registered: 05-2008
| | Posted on Sunday, May 11, 2008 - 08:13 pm: |
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I did not personally change the oil so I am not sure of the exact amount that was put in. The oil filter sits inverted high on the port side of the engine. |
Guy Gaspar
Senior Member
Username: guyjg
Post Number: 2008
Registered: 08-2006
| | Posted on Monday, May 12, 2008 - 11:25 am: |
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Swap pressure oil senders w/the other engine; if it follows the sender, replace it. |
Rod Stewart
Senior Member
Username: rod_stewart
Post Number: 1284
Registered: 08-2006
| | Posted on Monday, May 12, 2008 - 01:52 pm: |
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You may have a flakey oil pump, or an oil pickup that is leaking air into the oil.
Rod |
allan in st pete
Visitor
| | Posted on Monday, May 12, 2008 - 06:29 pm: |
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You may also have toooo much oil in the motor. the oil could be getting up to the crank, crank is wipping the oil into a foam and causing the oil pressure to drop...
I have seen this happen.
Just do another oil change and be sure of the oil level. hope this helps. |
