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Oil valve relief 500 Efi

Old 08-23-2011, 10:34 PM
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Quick question......Why do people have a problem with sending all the oil to the filter?? I plug mine and don't even think of using a bypass. If my filter plugs up with debris I have more problems than a clogged filter.
My friend bought a boat with a new ZZ502 that was supposedly "Marinized". The horses A$$ builder left the 11lb spring in. Engine was junk in months. Rebuilt it plugged everything and ran the oil through the filter and cooler and never had a problem.
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Old 08-23-2011, 11:10 PM
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I even bought the valves and didnt use them,

mine is pluged,I plug the bypass on all of my motors I build.
Attached Thumbnails Oil valve relief 500 Efi-bypass-004.jpg   Oil valve relief 500 Efi-oil-pump-hexajust-033.jpg   Oil valve relief 500 Efi-oil-pump-12-08-033-large-.jpg  

Oil valve relief 500 Efi-oil-pump-12-08-032-large-.jpg   Oil valve relief 500 Efi-6-25-2007-engine-002-large-.jpg  
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Old 08-24-2011, 12:51 AM
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Originally Posted by Rookie
Quick question......Why do people have a problem with sending all the oil to the filter?? I plug mine and don't even think of using a bypass. If my filter plugs up with debris I have more problems than a clogged filter.
My friend bought a boat with a new ZZ502 that was supposedly "Marinized". The horses A$$ builder left the 11lb spring in. Engine was junk in months. Rebuilt it plugged everything and ran the oil through the filter and cooler and never had a problem.
If you send all the oil to the filter/cooler and have no bypass (the way I prefer) if you have substandard oil lines, cooler or filter (too restrictive) and you run it hard cold (a bad idea) you can blow the filter apart, open internal bypass on oil pump, wear distributor gear or in a few circumstances shear off something in oil pump drive. If you have a weak bypass valve and substandard stuff, you are in real trouble, dirty, hot unfiltered oil will circulate thru your motor and in a boat it wont take much time before it will be junk, Smitty
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Old 08-24-2011, 03:22 AM
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Nice pics Strip Poker 388,I`m keeping the 30Psi on the ofset hole it`s cold up here now,have a nice day.
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Old 08-24-2011, 07:42 PM
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Originally Posted by 502 Magnum
Nice pics Strip Poker 388,I`m keeping the 30Psi on the ofset hole it`s cold up here now,have a nice day.

Yea I like taking picks

ya got to figure on the 500efi's "blue merc racing motors" thats the way they came,for instance Chip at Hustler told me in around 2000 said they had 150 race hours on a 388 Hustler with 500efis with no problems,

Also who runs there oil long enough for it to bypass? they deserve for the shet to come apart

Rob
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Old 08-25-2011, 03:30 AM
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Rob,
you`r so right ,maybe Merc have to much of the 11Psi valves so they use them in the midle hole on the black motors

Bjorn
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Old 07-10-2012, 11:13 AM
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Default Original question still unanswered

deleted. posted to wrong thread.

Last edited by rich allen; 07-10-2012 at 11:33 AM. Reason: deleted. posted to wrong thread.
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