Recent content by wn6ngp

  1. W

    '00 Mercury 90hp, oil injection still works, time to replace it with premix or replace worn parts?

    I've got 00 Mercury 90hp ELPT 2 stroke. s/n ot087666. About 500 hrs on it. No significant problems with it, no overheat, runs perfect staying on ethanol free. My question is should I do something with the oil injection mechanism? What I can see of things everything looks ok. Those small...
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    Troubleshoot Mercury 90 bogs over 4200 rpm

    Sounds more like a fuel delivery problem. If you are doing that rag test not on the lake just earmuffs you can get lots of unusual things since you don't the have back pressure on the exhaust. Can you have a buddy squeeze the bulb while you are on the water at your attempted speed.?
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    Is my mercury oil injected?

    I have heard others say the same thing. I wonder why that is the true.? Too much friction on the impeller with the pump housing, not enough water flow?
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    Is my mercury oil injected?

    While you are adding fuel and oil for premix use no ethanol. You will be happy you did.
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    Power Trim Up not working

    If the trim works anything like an outboard then there are pair of relays that serve to reverse the voltage going to the trim motor depending on whether you want to go up or down. In my case one relay failed and I could only trim up. Relatively easy and cheap to replace. In my case it was...
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    87 90 hp Mariner

    the experts here are going to want your s/n. newer versions of this motor like 2000 like mine use a fuel enrichner insted of a choke like you may be accustomed to. I'd check that operation out, make sure fuel lines to enrichner are good etc. or if its old fashioned choke plate make sure it...
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    Mercury 90 horsepower tilt

    that is correct, those relays have to be able to swap + to - in order to make up or down trim motor. The problem could be that the voltage going to the relay coils can sag or be temporarily interupted which sounds like what is happening if the relays can be heard charttering.
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    Mercury 90 horsepower tilt

    These relays do fail with time and use. I had to replace one on my 00/90hp. All they do when energized is to apply 12+- to motor to change directions. Just connect a light bulb(like an auto headlamp) instead of the motor and then measure the voltage to see if you get the proper toggle of 12v...
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    Merc 2006 50 hp 2 stroke carb tubing size help

    I happened to have some yellow fuel line from a previous project and the id is .1875" or 4.7mm. My experience has been that when attached the fuel line expands a bit so maybe 4.7mm would be ok. I remember looking at that oil wye hose hoping I never have to replace it. its lasted 23 years so...
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    Merc 2006 50 hp 2 stroke carb tubing size help

    I do remember some p/n's of those hoses listed in their parts book. It did have outrageous prices for each length, not bulk. Surprisingly, pricing for oem JD Tractor parts is even worse than marine.
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    89' 90 H.P. 3 Cylinder 2 Stroke Battery Charging Issue

    Can you determine if the stator is ok by measuring the AC output of the yellow wires? I would guess that you should see at least 10V AC RMS at high RPMs since it sounds like it is an ungrounded winding full wave bridge diode setup.
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    Mercury 90 2 Stroke fouling one plug after some use, stalls when accelerating

    Wow, you have done a lot of things. I've had similar problems with my 90hp although I've not had to dig that deep. Mine is a '99 model. Are you sure that its getting up to proper temperature? In my case the thermostat never closed enough at low speed so if I ran at low speed in a cool...
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    Mercury 90 2 Stroke fouling one plug after some use, stalls when accelerating

    which post is it? That link takes me to a lot of things.
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    Merc 2006 50 hp 2 stroke carb tubing size help

    You have to wonder how it was that the merc engineers came to choose that particular tubing size? Maybe someone told them that there was an excessive supply of that particular size so it would always be cheaper despite being an odd size. There seems to be a similar size of Tygon that is...
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    Merc 2006 50 hp 2 stroke carb tubing size help

    I'll be interested in finding out the answer to this fuel line size question. I've got an '00 90 hp version. At one time I thought I'd be proactive and change all those little hoses but I never could find the right size. The local merc dealer did not have them nor did he know what to use so...
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