Boating - - SEAMANSHIP -

Boat Doc­tor, I have a 2004 Chap­ar­ral 254 Sunesta with a 350 mag MPI en­gine with a Bravo Three drive. I pur­chased it in Septem­ber 2017.

I was out on my boat fish­ing this week, and the boat ran well to Sani­bel Is­land, but on the way back about half­way home, after I went through a mana­tee zone, I went to open it up and it felt like the en­gine was flood­ing out at full power. When I eased back on the throt­tle, it ran fine at about 25 to 30 mph. What do you think is the prob­lem? Do you think the en­gine is not get­ting enough or too much fuel? Do you think it is the gas fil­ter and the fuel sep­a­ra­tor? I am baf­fled.

I thank you in ad­vance for your as­sis­tance and co­op­er­a­tion, as it is deeply ap­pre­ci­ated.

Phil Bruno

Cape Coral, Florida


Mr. Bruno, I reached out to our con­tacts at Mer­cury Marine, ini­tially to find out if there were any re­calls or spe­cial ser­vice memos for your en­gine. They were pleased to ad­dress your ques­tion. The Mer­cury con­tacts asked that you first check to make sure all of the spark-plug wires are prop­erly seated. Ad­di­tion­ally, they sug­gested you re­place the fuel fil­ter and check for fuel-line vac­uum leaks. Be­yond this, they in­di­cated that they would re­ally need a G3 full re­port to check for faults. They also asked that you con­sider in­stalling Ves­selView Mo­bile. This con­sists of a plug-in trans­mit­ter that en­ables you to view fault his­tory on your mo­bile de­vice, plus much more. You can read Boat­ing’s on­line review of Ves­selView Mo­bile at boat­ing­mag.com/new-mer­curyves­selview-mo­bile-app.

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