At an idle or on the hose espescially water pressure will be low(in the water should be roughly 8 or so I believe and on a hose 1-3). The engine will run warm to hot at idle(about 160-170, but will cool down after about 3K RPM's. I'm pretty sure that engine uses water pressure to bypass the stats at a certain RPM to allow the engine to run cool under load. Also the bypass hose hooks up to a pop off valve, and if it bleeds off pressure it won't allow the stats to be bypassed and can cause overheating.
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR
2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD 
AND THE PINK JEEP!!!! R.I.P.
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