volvo penta Runs and drives but once it reaches operating, it shuts down.

[SankorLiu]

My friend has a boat of 1984 Bayliner Cierra 2755 260 volvo penta. It Runs and drives but once it reaches operating temperature shuts down. What issue is there? Is it easy to fix?

Thank you

 

[Scott Danforth]

could be anything.

check the condition of the raw water impeller
check the distributor, cap, rotor, plugs and wires
check the fuel system - specifically fuel quality, choke settings, and condition of carburetor
check engine compression

 

[alldodge]

Need more info on what shuts down means?

If it shuts down like turning the key OFF, then most likely electrical
Might be the key switch, kill switch, bad connection that is heating up

If it stalls out
Then look at fuel and the lack of

 

[PaulinSWFL]

I have heard form a local mechanic here in SW FL that the ignition coil causes this problem if it's a recently installed after market one. There is a MerCruise replacement that he has the part number for. I can get it if you can't find it. He has had a recent bunch of calls (mobile mechanic) for this exact complaint/issue.

 

[Scott Danforth]

Its almost never the coil

 

[PaulinSWFL]

Its almost never the coil

That was this mechanics opinion too until he methodically eliminated everything else. I have the so-called bad coil in my 95 Chris Craft 502 Ford.