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Old 06-08-2010, 08:11 PM   #1
lady bug
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Default oil pump prime

i have just rebuilt my 295cc robins engine and i am having diffculties keeping the oil pump primed. i have got it primed it took about five mins and then it took prime i have a test light hooked up to see if its working and the light goes out when i acheive prime. but if i let it set for any amount of time it looses prime. any input on this would be great thanks guys
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Old 06-10-2010, 08:18 PM   #2
lady bug
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Default Re: oil pump prime

does any one have any input on this
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Old 02-13-2015, 08:22 PM   #3
Coryhayess
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Default Re: oil pump prime

Did you figure this problem out? I am having the exact same problem with mine.
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Old 02-13-2015, 09:24 PM   #4
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Default Re: oil pump prime

Break down what you got going on. His post is 4 yrs old. I haven't heard of one not priming but I suppose its not beyond the realm of possibilities.
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Old 02-14-2015, 05:08 AM   #5
Coryhayess
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Default Re: oil pump prime

I picked up this 97 ezgo workhorse with a rebuilt robin 295cc. The previous owner couldn't get oil pressure and the price was right, thought I'd take a shot at it. I've been through the whole motor top to bottom and can't figure out why it won't keep prime. New oil pump gears, filter, O rings, and I made a new oil pump cover out of 1/8" steel. I can get pressure if I fill the pressure sensor port full with oil, but it only lasts about 5 min or so. I am using a oil pressure gauge. Any help/ thoughts would be greatly appreciated.
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Old 02-14-2015, 05:13 AM   #6
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Default Re: oil pump prime

I'm not sure about the pressure since my pressure sensor is not hooked up. I also have a 97 with a 350 that I rebuilt several months ago.
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Old 02-14-2015, 05:21 AM   #7
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Default Re: oil pump prime

Are you sure that the check ball is in place?
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Old 02-14-2015, 06:30 PM   #8
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Default Re: oil pump prime

Yes I totally dismantled the engine and checked every possible thing I could think of. If I prime the oil pun it will keep 25psi for about 5 min or so.
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Old 02-14-2015, 06:58 PM   #9
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Default Re: oil pump prime

Could you take the valve cover off and run it to see if oil is making it to the top of the head?
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Old 02-14-2015, 07:26 PM   #10
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Default Re: oil pump prime

It is pumping up there perfectly until it looses pressure then nothing up top
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