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#1
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Would you believe it was the MAP sensor causing the problem all along and there were no fault codes to indicate such?
I now have 3 OBDII readers and a temperature gun in the stock pile, the first two OBDII readers would not link up to the computer. I accidentally found/purchased the third reader and it confirmed the overheating. For the meanness of it I replaced the MAP sensor and after a week of driving and a tank of gas the gauge never got over 205°.
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 '75 Cuddy with '00 Johnson Ocean Pro 150 horse Benny Last edited by tsubaki; 01-13-2014 at 05:29 AM. 
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#2
01-12-2014, 03:39 PM
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And yes I realize this thread is over a year old.
I've been fighting this thing since August 2012! And FERM the fan would come on at 221.9°, so you were dead on the money!
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'75 Cuddy with '00 Johnson Ocean Pro 150 horse Benny
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#3
01-12-2014, 05:10 PM
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Glad you were finally able to fix it...if you are like me, stuff like that can drive you crazy until you figure it out.
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*************************************** Stay Safe!  Sold - 1984 V-20 Cuddy with a 2003 Johnson 140 hp gas sippin 4-stroke. 1995 Ranger 250C with a 2015 Suzuki 300 hp 4-stroke.
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#4
01-13-2014, 02:21 AM
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Congrats Tsubaki.. It's been a long hard fight I'm sure. Glad you came out the winner. Now it's miller time!!
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1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer 1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer 1996 V21 w/1993 200HP Mercury on a Shoreline Trailer All towed by a 5.7L Hemi Durango. If God didn't have a purpose for us we wouldn't be here, so Live simply, Love generously, Care deeply, Speak kindly. (Leave the rest to God)  Silence, in the face of evil, is itself evil. Not to speak is to speak, not to act is to act. God will not hold us guiltless.
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#5
01-13-2014, 06:51 AM
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MAP sensor? Was it running rich or lean? it doesn't make sense to me, but whatever works
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#6
01-13-2014, 10:38 AM
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Jeeps run lean to begin with for emissions reasons. If the MAP was far enough off it can push stoic up to around 15.5-16:1 which would lean it out big time. Never heard of one doing it at idle unless for some reason it wasn't going into closed loop.
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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. http://www.wellcraftv20.com/communit...ad.php?t=11664 
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#7
01-13-2014, 02:52 PM
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I actually argued with my father that it was not possible to be the problem. His response was "you done replaced everything else, it's going to be a lot easier changing it instead of replacing the head gasket or timing chain".
The live data stream from the code reader showed the timing jumping all over the place after it got warmed up, I was convinced the timing chain was stretched slightly. Glad I was wrong and did like Daddy said.
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'75 Cuddy with '00 Johnson Ocean Pro 150 horse Benny
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