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Discussion Starter · #1 ·
High oil pressure after running for 30 minutes. Replaced oil relief valve , screens in pump, cleaned entire oil pump and oil sump completely dry. Reassembled and installed engine. New oil 10w-40 with new filter.
why do I still have high pressure?Old turbo is mounted on it so I don’t loose oil. Any recommendations?
 

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Discussion Starter · #4 ·
the high oil pressure alarm should activate when pressure falls below 31psi and the low activates below 3psi
I got the engine out of a wrecked ski from a place in Florida, I assembled it with a oil pump assembly and housing from one that was sank and the engine locked up. After running it, it blew a new turbo and snapped the impeller shaft. I took oil pressure readings a bit to late, they wouldn’t warranty the turbo for logical reasons, I removed the engine and replaced the relief valve, installed a whole new oil pump assembly, blew out all the passages in the housing, installed new internal screens. Removed the oil sump and completely cleaned the debris out. Installed it and cold at idle for two minutes I have 80 psi. It is driving me nuts. Also new Honda oil filter and new oil
 

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I would suspect a potential clog/restriction in the balance shaft oil ports, crankshaft oil ports, cylinder oil nozzles, cam oil passages, banjo bolt screen feeding turbo, as well as turbo return lines. Could be any of these areas having a restriction/clog.

The pictures you posted show 40 psi at 3000 rpm, if I see clearly, that is within spec according to the factory service manual. I would connect the oil pressure gauge to monitor during a ride. See what the pressures do cruising at 5000 rpm. You may see a jump in pressures, 60-120 psi during the initial jump in throttling, but does it settle down to a lower psi shortly after? If so, what is that psi?
 

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While engine is cold, oil pressure will be 60-80 psi. Once running, turn on hose and let it warm up for 15-20 mins, at that time you will get a more accurate reading on the oil pressure guage.

I have experience on many systems, it's the overall skills developed through experience that I have. I've also recently rebuilt a F12X Aquatrax, just another engine squeezed into a vehicle of a type.

Looking forward to the results you come up with.
 

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Discussion Starter · #10 ·
I ended up taking the ski out today and with a passenger on the rear it ended up taking on water into the hull and slightly went into the intake, I pulled the plugs and cranked it over, put the plugs in, started it and it runs but after 10 seconds the engine doesn’t run that well. Nothing but issues with this ski
 
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