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Old 07-14-2016, 03:22 AM
ourx15 ourx15 is offline
TT Regular
Join Date: Apr 2012
Boat: Mastercraft x15 2012 5.7
Location: saskatchewan
Posts: 53
Circulation pump

Hello. I have a 2012x15. The heater sucks!!!! I have being reading that it might be the circ pump? Can anyone tell me where this is located? If there is even one on it? Or is there anything else I can try? Dealer said to not change thermostat. Leave what ever came with it. Also, would changing to a heater craft make it blow hot? Any help is much appreciated. Bu the way, it is a 5.7l illmor
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Old 07-14-2016, 07:41 AM
bcd bcd is offline
MC Fanatic
Join Date: Jul 2011
Boat: 2014 X-2
Location: Dubuque, IA
Posts: 830
They changed the original thermostat that came with 2012s. They were set too low. They lowered them that year because they were concerned about CAT life (first year if production). Current production is now a higher set point. If it has the old one, I'd change it. I had a 2012, the heater sucked. I complained and they put a kit to help - new thermostat, moved the hot water supply to a hotter point and moved the cold water return to get more flow. It helped, but still sucked. My 2014 doesn't have the heater option. I was going to install my own, but with a 1 year old, I no longer find myself out as much at times where a heater would be nice.

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Old 07-14-2016, 10:30 PM
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blackhawk blackhawk is offline
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Join Date: Jul 2013
Boat: 2006 X15 350 MCX
Location: Virginia
Posts: 840
My 2006 X15 does not have a dedicated pump just for the heater. I really doubt that yours does either. I had trouble with mine not blowing a lot of air. I found that my access door behind the bow seat was mashing the hose nearly flat.
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