150 hp mercurymariner EFI engine

[John Wayne Tyson]

"The engine was not used for a

"The engine was not used for about (2) months during the winter. It cranks good,idles good when first cranked, and runs at top speed good. After engine gets warm it does not want to idle. I was told I might put some Sea Foam in the gas tank and run to see if this might clean out the injectors. Will this product be okay to use on this EFI engine or does anyone have other ideas"

 

[rangerman]

Seafoam is a great product. I

Seafoam is a great product. I use it on my 200 EFI.

 

[jaseman]

"I have had this problem, the

"I have had this problem, the sensor (port side think) on the head, has three wire coming out, replace this and it should fix the problem. It is telling the computer that the engine is still cold, even when it is warmmed up."