Tom7227 Posted April 17, 2015 Share Posted April 17, 2015 A friend has a Honda 4 stroke 25 and it doesn't want to run in cold water. It is probably 10 years old. Do they have a thermostat in them or something that could be causing this?Thanks for your time.Tom Quote Link to comment Share on other sites More sharing options...
boatfixer Posted April 22, 2015 Share Posted April 22, 2015 I believe they do yes. The other thing I've noticed with smaller carbed 4s motors is the very small idle passages in the carburetors. Any build up of crud will affect cold operation. Quote Link to comment Share on other sites More sharing options...
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