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You don't want a 63HP they will put out huge pressure 140 + you want a 63HV gives volume at way less pressure.

Think the Hp is for industrial motors like water pumps that run 24/7 at 4000 rpm. with a canaster style filter.

took one off a friends 440 would blow the filters up and off sometimes and buried the 140 oil pressure gauge. Sharp pump gears as opposed to the rounded ones






If that happens, it's not due to the HP pump/spring. Either the relief valve was stuck, or the pump volume was greater than the relief valve could bleed off. Of coures the motor would need to be pretty tight as well.

The HP is all I use anymore.

Last edited by BSB67; 03/15/12 11:03 PM.