www.iFourWinns.com

Looking for some help here. I have a 2008 V258 and the motor has 150 hours on it. I took it out and for some reason, oil pressure seems high on gauge. Idling at 55 and give it gas and it pegs out at 85. I don't recall it every being this high in years past. I had a manually checked becuase I know sometimes gauges lose their way. Low end is 55 and high is 85. Is this normal for this kind of boat and engine?

I did just have the oil changed after the fact but concerned and do not want to cause damage.

Thanks
D.C. boater

For your oil change, did you use the same oil? Sometimes switching to a "lighter" weight (thinner) oil will cause oil pressure to rise.

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1996 205 Sundowner DLX
5.0FL Volvo SX Cobra
Tow Veh: 2012 Nissan Frontier Pro-4X

I'm thinking its the other way 'round, I know when I switched from straight 30 to straight 40 mine went up a bit. I used to get cold idle 40 with both but hot idle was a bit higher with the 40. Sometimes corrosion on the terminal for the sending unit can make electric gauges give incorrect readings. The sending units operate on resistance and corrosion on the terminals are kind of un-anticipated resistance, LOL....
The 85 is high, I think the highest I ever saw on mine was about 65 or so.

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88 Four Winns 200 Horizon
4.3 OMC Cobra-4bbl
2002 Walker Bay 10/2012 Suzuki 2.5
2008 Walker Bay 8

1998 Jeep Grand Cherokee 4.0/Selectrac
2007 Jeep Grand Cherokee 5.7 Hemi/Quadradrive II

Haaa, dang Lou, right again. I'm gonna stop posting advice tonight, my dyslexia seems to be working overtime....

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1996 205 Sundowner DLX
5.0FL Volvo SX Cobra
Tow Veh: 2012 Nissan Frontier Pro-4X

The 4.3l engines in my 278 Vista do the same thing.... until the engines get a good long run across the lake. Then I get 20psi hot idle oil pressure and 50-60psi or so on plane. But the first time I get on plane every time, the oil gauges peg at 80. I use 15w-40 Mobil Delvac FWIW.

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1997 Four Winns Vista 278
T - 4.3l EFI
Kohler 4esz Genset
379 hours as of 8/8/21