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500 EFI t'stats

Old 12-16-2018, 04:43 PM
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Default 500 EFI t'stats

Anyone know if there's a way to test an oil t'stat? I know you can boil a water stat to see if it opens - anything similar with an oil stat? Thanks for any help!
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Old 12-16-2018, 06:27 PM
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Same. the t-stats are designed/made the same.ie: wax pellet that moves the disc open.
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Old 12-16-2018, 07:01 PM
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Thanks. Any idea what temps they should open at?
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Old 12-16-2018, 07:14 PM
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Might be stamped on the Tstat. Mine opens at 212F but is Hardin Marine. I thought the 500 EFI was supposed to open at 190F
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Old 12-16-2018, 07:54 PM
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I warmed up brand new motor oil the reason why I use motor oil because of 2 reason.

One to simulate the world it lives in and 2 is I am NOT 100 percent sure using water that corrosion or tad of it would take place however

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Old 12-16-2018, 08:22 PM
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Originally Posted by BUP View Post
I warmed up brand new motor oil the reason why I use motor oil because of 2 reason.

One to simulate the world it lives in and 2 is I am NOT 100 percent sure using water that corrosion or tad of it would take place however
Thanks BUP i was wondering about water getting into it as well. Domyou know what temp the Merc one opens at?
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Old 12-18-2018, 01:38 AM
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Sorry I have been busy. anyways post # 35

Hp500 Oil Temp
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Old 12-18-2018, 01:48 AM
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Merc part number is 816153 and like I said - not sure how well it will do in water. It is not like a water / coolant T stat at all. For whomever has never seen one inwhich I have no idea. Would think not everyone has seen these. Just saying.
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