Johnson 4.5 fuel issue

[Lancerdad34]

I have a 1980's 4.5 johnson that has been running pretty good unitil now. Today when I was out trolling all of a sudden it acting like it was starving for fuel and kept stalling. I had to keep choking it it would start but not stay running long. I just added fuel to the 2.5 gallon tank yesterday. Before I get into fule filters and such could this be a bad gas issue? I am thinking of either adding sea foam or just emptying the tank and add fresh fuel. Thanks for any advice!

Brian in MI

 

[Crosbyman]

anything clogging orifices ,filters, hose etc... will starve it so a close inspection of all the fuel route is required. incl. fuel pump cap. !!

pump the bulb and if it runs ok suspect the fuel pump

 

[racerone]

Water pump impeller replaced every 5 years ??-----Do a compression test and check spark.----Sounds like it is running on 1 cylinder.

 

[Lancerdad34]

Sea foam cleared it up. Must gave had a little moisture in gas. Thanks for the advice!