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    Best spark plug to run in 2005 50hp efi outboard

    I need to replace the plugs in my 2005 50ELPTEFI. I have been in racing all my life, Stock cars and Drag Cars, and I have run a variety of spark plug brands through the years. But this is my first venture into maintaining an outboard engine. Is any one plug brand better than or especially bad...
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    Need help removing throttle shifter

    I am looking for instructions on how to get this mercury throttle apart without breaking anything.
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    Looking for a part number for pice on steering cable

    I replace the steering cable in my boat over the weekend. The job went great, except for one tiny issue. There is a black plastiv cap that screws on to the tilt tube, it have a small spacer and an o-ring that it holds into place. Well I cracked it. Ontop of that when i removed it there was no...
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    Looking for help on why fuse may have blown

    The 20A fuse for the ignition blew while winterizing the boat last fall. We were running fuel treatment through the fuel lines and engine when after 5-6 minutes the engine just shut off. We looked around and didn't find much when it happened. I bought a service manual and was going through the...
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    50HP EFI Merc quit while warming up before outing

    I have a 2005 50HP EFI Mercury outboard. I was at the house with the hose connected and was warming it up for an outing. When it just quit after maybe 4-5 min of run time. No gurgling or surging, it just quit. When trying to restart it turns over fine, but feels as if there is no spark. I...
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    50hp Merc outboard makes gurgling sound then prop loses grip

    We had the boat out last Sat for beautiful day, the boat ran great. Then we went out with friends on Monday. Idling out of the harbor it started gurgling and running rough then quit. It started right back up, I put it in neutral and stabbed the throttle a few times and there was hesitation. Like...
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    hard to turn under power

    I have a 2004 Fisher Liberty 180 with a Mercury 50hp EFI engine of the same year. Under power it is hard to turn in either direction. On the trailer or just sitting in the water it is much easier. I have greased the steering mechanism and it is still difficult. It is almost like under load it is...
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    50HP merc appears to be popping out of gear

    Last night we took some neighbors out on our 18' Fisher pontoon boat. While at full throttle three or four time it appeared to pop out of gear, and the RPM's shot way up. I immediately pulled the throttle back and then when the RPM?s were just about to reach idle I would go forward a little and...
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    50hp Mercury acting up

    June 6, 2016 at 1:43 pm#1623199 I have a 50 horse Mercury. Starts and sounds great. Put it in the water, max RPM is about 3400. Should be pulling 5500 easy. Boat has the original prop, it is in great shape. Talked to a local shop, the suggested quick Kleen fuel treatment and 2 stroke oil. Due...
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    Port&Starboard lights YES, stern Light NO

    i think it is a double pole double throw switch, i took all the wires off and then back on to see if it was a corrosion issue. No luck Here is a picture of the switch connections.
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    Port&Starboard lights YES, stern Light NO

    My light switch when placed in navigation, the port and starboard lights come on but the stern light does not. When I put the switch into the anchor position the stern light works. My thought is the switch has gone defunct, but I would like some testing ideas and your thoughts on the matter...
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    Max RPM out of 50HP efi is 3400

    I have a new to me 2004 18' Fisher with a Mercury 50hp EFI 4 stroke. Yesterday was our first outting, i read max rpm is 6000. The most I could get was 3400. I still need to look at what prop is on it, but I am sure it is the one that came with the motor/boat when new. I got it from my inlaws...
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