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  1. DanOnTheBoat

    1987 2.5L Mercruiser inboard/outboard

    It has an aftermarket carburator. I still have the OEM one.
  2. DanOnTheBoat

    What gas do I use in my boat???

    Appreciate the replies guys. Would using higher octane be better for the engine? If I use Octane 93 in my instansce, or would that make no difference?
  3. DanOnTheBoat

    What gas do I use in my boat???

    Hi guys, I'm a new boat owner and I still have the question to what is the right gas that I have to use in my boat. I know that I should be using ethanol free gas but where I live here in Ontario, Canada, they don't have ethanol free gas... I have a 1987 Mercruiser 2.5L in my boat and the last...
  4. DanOnTheBoat

    1987 2.5L Mercruiser inboard/outboard

    Hm okay, I'll definitely look into the fuel. I filled it up at a gas station with octane 87, I heard it's okay to run mercruiser engines on that fuel but it's bad to let it sit. I live in Ontario, Canada and basically everywhere here the fuel has up to 10% ethanol. Do you think fuel stabilizer...
  5. DanOnTheBoat

    1987 2.5L Mercruiser inboard/outboard

    The thing is I filled the boat up with fresh gas yesterday, I ran through half a tank of it. The engine wasn't running rough or anything it idled and accelerated like usual. I do have a brand new fuel/water separator that i have installed about a week ago, I've removed it yesterday to see signs...
  6. DanOnTheBoat

    1987 2.5L Mercruiser inboard/outboard

    Hi everyone, new here. Also a new boat owner. So I took out my boat, it has a 1987 Mercruiser 4 cylinder inboard engine. I took it out yesterday and drove it for about 45 minutes straight no stopping, was on plane cruising at around 2500ish RPM. I then started to feel and hear my engine slowly...
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