Hello All,
40 year sailer, newbie power boater.
Power is a Mercruiser MCM120 (I4 153ci) sn/5828###, stearn drive pretty sure, alpha.
she can idle/run slow all day(150/160F), but when I get on her to pull the kids on a tube, the temp climbs way too high (reads over near 210/220)
Purchased an...
