LEAVE THEM IN! More engines get ruined by people taking the t-stats out than anything else. Make sure you have the black plastic housings(not the white ones), and that the seals in the heads are still good. Without t-stats that engine will never idle right, will foul plugs like no tomorrow, and end up sticking a ring. Loopers need to run about 155-160 at an idle, but cool off to 120-140 when running, so also make sure the throttle valve is working to. And the 85-87 small bore engines seem to be even pickier about running at the exact temp than the 88+ large bore engines.
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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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