The blow off valve opens around 3000-3500 rpm's to bypass the t-stats, and let the engine run cooler. If the valve sticks it can cause overheating, but not put water into the engine. Unless it overheated and blew a headgasket.
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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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