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Oil type and level for fuel pump housing

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Oil type and level for fuel pump housing

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Old 06-04-2007 | 09:49 AM
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Default Oil type and level for fuel pump housing

I have HP500 motors with the belt drive fuel pump what type of oil should be in the housing and how much?

I saw there is a side plug in it and am thinking you just fill to that level.
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Old 06-04-2007 | 10:23 AM
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yep...there should be two plugs...one to fill(top) and one to drain(bottom)
fill w/90w oil and good to go
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Old 06-04-2007 | 07:21 PM
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my 98 500s only have one plug i seperate the fuel pump wipe out the fuel and oil and fill with gear lube to plug bad design.
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Old 06-04-2007 | 07:39 PM
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Mine only had one plug as well. I could take out most of the bolts on the seapump bracket and tilt it enough to get out 95%of the lube. I've always used Merc Hi perf gear lube aka drive lube.
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Old 06-04-2007 | 08:59 PM
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Mercruiser Spec Says Hi-preformance Gear Oil
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Old 06-05-2007 | 08:49 AM
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mine was the same one hole in the side of resevoir
Removed fuel pump was rebuilding water pump also so just removed whole assembly and then emptied it out and then used royal purple synthetic
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