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Mercury 2004 Optimax 150 Overheating

snowbird

New member
Ongoing problem. Overheats occ

Ongoing problem. Overheats occassionaly at higher speeds. Has been in shop 3 times in the last 3 weeks. Impeller and water pump replaced. One hose was slightly crimped...this was replaced. Tech tells me that the computer tells him that it is the port head that overheats. Tstats check out ok. Senors check out ok. We are on the verge of calling in Mercury tech. Hope he finds problem. Any ideas from any of you on what it might be?
 
PROBLEM SOLVED! Tech removed

PROBLEM SOLVED! Tech removed the power head and found that there was one hole not drilled in the left side the head. This allowed the motor to overheat on the left side. Can you believe that this passed inspection at the Mercury plant!!!! Mercury is now shipping a new power head as it was under warranty!
 
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