"hi I have a 4.3 mercruiser v6
"hi I have a 4.3 mercruiser v6 fresh water cooled. It started to heat up more than usual over the weekend after some hard runs (tubing). the temp usually sticks at 150, but yesterday climbed up to 170 so I eased off and let her idle to cool down... it only seems to really climb if I really throttle it, but it takes a 5-10 mins of hard running to make it climb. I do think have a slow coolant loss somewhere but I dont see any visible leakage from under the motor... is this normal to have minor coolant loss over time? i did top it up once before a few months ago and the temps been fine... I havent checked the overflow tank and Ive never overheated it."
"hi I have a 4.3 mercruiser v6 fresh water cooled. It started to heat up more than usual over the weekend after some hard runs (tubing). the temp usually sticks at 150, but yesterday climbed up to 170 so I eased off and let her idle to cool down... it only seems to really climb if I really throttle it, but it takes a 5-10 mins of hard running to make it climb. I do think have a slow coolant loss somewhere but I dont see any visible leakage from under the motor... is this normal to have minor coolant loss over time? i did top it up once before a few months ago and the temps been fine... I havent checked the overflow tank and Ive never overheated it."