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#33
02-24-2007, 10:17 AM
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Re: Poppet valve '99 Merc 150
do you have a temp and or pressure gauge? If not & you keep this motor, they are an easy install and give you good info. With a new impeller i get 12 \15 psi @4000 rpm. When it drops to below 9 I put a new one in, or once a spring, not only for cooling, but to keep the drive shaft lubed.
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