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Total newbie here: What type of fuel to use?

Engine, transmission, I/O, OB and generator repair and maintenance discussion forum.
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BubGlub
Posts: 4
Joined: Mon Aug 16, 2021 11:30 am
Vessel Info: 1998 Wellcraft Excel 260 SE - Mercruiser 7.4 - Bravo 2
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Total newbie here: What type of fuel to use?

Postby BubGlub » Thu Aug 19, 2021 7:22 pm

I'm see conflicting advice on that. It's a fuel injected 7.4 in my 98 Excel 260.

Do I just get pump gas? Regular? Or is there something else?

Sadly, there's no owner's manual for this boat that I've been able to come up with.

12XX hours total, just tuned and oil/filter changed.

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Racin4ds
Posts: 4
Joined: Mon Oct 13, 2025 11:31 am
Vessel Info: 2000 WellCraft 186 SS
4.3L Mercruiser with Alpha one stern drive
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Re: Total newbie here: What type of fuel to use?

Postby Racin4ds » Thu Oct 16, 2025 12:48 pm

I'd run a premium pump fuel to be safe, boat engines are under a lot of load and the extra cushion from some higher octane won't hurt a thing. Just remember if it has ethanol in it, youll need a fuel stabilizer or it will go bad and draw water from setting.
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bigblocksarefun
Posts: 32
Joined: Fri Oct 06, 2017 10:01 pm
Vessel Info: 1989 32' St Tropez w/twin Merc 260hp 350/5.7l
1996 Key West 1900DC w/Yamaha F150
Location: MD
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Re: Total newbie here: What type of fuel to use?

Postby bigblocksarefun » Thu Oct 16, 2025 5:02 pm

On a roll with the dead threads, huh lol?
USCG retired
Current:
1996 Key West 1900DC w/F150 Yamaha
1989 Wellcraft 32' St Tropez (resto/Great Loop project)
Past:
1975 Crestliner Crusader 17.5' C775 (never accept a free boat)
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