250 ProXS w/ Tourquemaster 2 Lower Unit
Serial #2B009219
Recently bought motor with rebuilt powerhead. I hit a log and jambed up my low water pickup. Cleaned it out. Water pressure at idle was 0.7 on merc-monitor. I didn't get to check WOT because it was still under 10 hours and I stayed below 5K rpm's until 10 hours. After hitting stump, I changed impeller, removed both tstats (both had wood in them keeping them from fully closing), cleaned the compressor strainer (it was clean) and cleaned the poppet valve (it was clean). I also taped up the low water pick-up and hooked hose up to rear of engine and let water run while the strainer was out, hoping to clear any other debris. After getting everything cleaned, I am getting 2+lbs at idle (good there). The most I can get at WOT is about 16. When not trimmed much and running hard, I am still well below 15lbs. This may be to specs, but I am not use to running with this little water pressure. I am 3 1/2" below pad so I know that isn't the issue. Even before hitting the log, the water pressure at around 4k rpm's was maybe in the 12lb range.....hardly any trim.
Could this be my issue? Where my water pressure line comes out of the rear of the engine, I installed a "T". From the "T", one line goes to the sensor that sends it on to merc-monitor. From the other side of the "T", it goes to a sending unit that shows water pressure on a gauge on the dash. There is only so much water that can travel out of the engine and through the small hose. Am I halfing it by having the "T" there? Or am I overthinking and possibly have a issue somewhere else.
Just FYI, the gauge on the dash sux. It never moves from 0 at idle and only goes to about "maybe" 10 at WOT when my merc-monitor is reading 16.
Thanks,
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Originally Posted by Savage
