Recent content by donaldboyer

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    Backfire at low revs

    Hi all, 1988 Merc 90hp 2 stroke, 3 cyl Serial #0b312461 I have an issue with my engine in that it seems to back fire a little at low revs. I tried to video this today, but it wouldn't do it while I have the camera running! haha! At low revs (900 - 1500 rpm) in OR out of the water, it...
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    Thermostat / Poppet valve replacement.

    Hi all, 1989 90hp I want to replace the thermostat in my engine as I think it is the original. Can anyone give me any advice, or things to do/not do etc. Does anyone have a link to a Selocs manual for this job? Also, do I need to replace the poppet valve as well? Talked to the Merc guy today...
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    Tandem Trailer Shaking

    Hi All, I have a 17ft Fibreglass Boat on a tandem trailer. At the weekend I noticed at certain speeds (80-90kph and also at approx 105kph) the sides of the trailer seem to rapidly shake up and down by approx 7cm. The shaking seems to be centered just in from of the wheels at the point where the...
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    Car charging boat battery

    Hey All! I was thinking about how to keep my batteries topped up in my boat while on the long drive to the lake with the fridge running. Both my boat and my towing vehicle are 12v, so was thinking I could connect the boat batteries to the cars 12v system while the car engine was running to...
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    7.5hp remote switches

    Hello, I have a 1984 Merc 7.5hp 6613032 which I have wired a switch on the dashboard so that I can start and stop it remotely. Simple question: At the moment, the stop switch is a momentary switch. If I were to change this to a toggle switch, would there be any negative implications when the...
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    Drain Carbs

    Hello, I am about to winterize my engine (Merc 90hp 3 carb). I have mixed a tank of fuel with fuel stabiliser, but I understand there will be some fuel still in the carb bowls, lines etc etc. I want to remove the carb bowl bung, but I see in the manual the main jet is also with this bung. If...
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    Winter Fuel Prep

    Gidday, 1988 Merc 90hp 3cyl carb'd s/n#0b312461 1984 Merc 7.5hp 2cyl carb'd s/n#6613032 I am planning to take the boat out for a trip this weekend for probably the last run before winter. What fuel treatment/procedure should I follow to ensure the carbs and fuel lines are kept in good...
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    90hp Weird idle

    Hello!! Mercury 90hp 1988 s/n 0b312461 Recently had our boat on holiday for a couple of weeks and part way through this time a problem started with the motor. Wouldn't idle very well... Symptoms: Motor stalls at random times (2 - 3 times per min) when at idle (in or out of gear), and needs...
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    Weird starting

    Hello all. Mercury 90hp 1988 0b312461 I have had intermittent trouble starting this engine. I have not been able to determine a pattern to what causes the problem (yet) but I can tell you what happens when it does start and hopefully that will give some clue to the cause of the problem. Boat...
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    Power Trim fluid

    1998 Mercury 90hp 3cyl 2 stroke Hello, I noticed the fluid in the power trim reservoir is a little low and I want to top it up. The manual says to use: ATF fluid Type F, FA or Dexron II I have some Penrite ATF fluid here which says it can be used where GM Dexron II spec is required. This...
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