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    Battery Switch Confusion

    Hello everyone. So I'm looking to get and install an on/off battery switch for my boat, since everytime I go to use the boat I have to manually connect and disconnect the wiring so it wouldn't drain if something was to be left on. I've watched plenty of How To videos and im still confused. It's...
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    Does the antifreeze you use really matter?

    So bought antifreeze to winterize my boat this year. It's the winterproof all purpose -50 pink antifreeze. As I was reading in the side label of it it said that it's OK to use it for boats... a few lines away it stated "This product is not designed as a heat transfer fluid for closed loop...
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    What oil should I use?

    So... looking to change my boat engine oil this year before winterizing it. What oil should I use? I have a 4 cylinder 2.5, 120hp merc inboard/outboard engine. Its an 87. It has an oil cap on it saying 10W-30. I looked online to see what comes up, I found few online a Quicksilver to be specific...
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    What is the right jet for my engine?

    So I have a few spare main jets for my carburator for 120 Merc. Right now I have #70.9 jets in carb. Tried to look online to see what the factory jet is for the engine carb and can't seem to find it. Figured i'd try and get advice/help here. What is the factory main jet sizes for the Merc 120...
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    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...
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    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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