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    75 Horse Mariner flooding

    I have a 1988 75 horse 3 cylinder that for the most part runs great. But sometimes for no obvious reason it will start running rough and dying than hard to start. What I notice is that gas will start leaking out at the same time it does this. Not sure but it sounds like a float that is getting...
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    Motor wont go past 4100 rpm at WOT

    I have a 1988 75 horse Mariner 3 cylinder. It will push my boat to 34 mph. All of the sudden it wont go past 4100 rpm at WOT. It idles ok and revs up when in idle but just gets a point and wont go any faster. The gas is fresh and the spark plugs are new and I also have a water separator...
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    Weak pee stream on 50 ELPTO

    I have a very weak telltale stream after I changed my impeller so I took out the t-stat to see if that was the problem. The stream was much stronger with the muffs and hose. The t-stat has no corrosion on it and I was wondering if it is still good. It’s in the closed position but all of the...
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    Weak water stream on 50 ELPTO

    I just changed the impeller on my 2008 50 ELPTO but the water stream is still pretty weak coming out of the pee hole. The motor is still cooling but I don’t think the stream is strong enough. I cleared the tube of any obstructions but I don’t think the pressure is what it should be. Any thoughts?
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    50 horse 3 cylinder Mercury not charging

    After a three day trip my battery died on the third day. When running at WOT the battery only showed 11.8 or less volts. The tachometer only works intermittently but stopped working all together so I figured it was the stator. I disconnected the battery and checked the stator wires and got 700+...
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    Tachometer troubleshooting help

    My tachometer on my Tracker pontoon with a 2008 50 horse mercury 2 stroke isn't working. I ran some current tests and it has power and ground and it's getting a signal from the motor. When the ignition is off it shows about 400 rpms, when I turn the key the needle drops to 0. I know the stator...
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    Serial Number not found /. How to test rectifier

    I just bought a pontoon with a 2008 50 horse Mercury but the tach isn't working. I have read several posts about a bad rectifier being the problem. Whenever I put in the serial number 1B712561 it comes up not found. I can't check for the part to see what it looks like or to make sure I'm...
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    Primer bulb going flat

    When going across the water in my 75 horse Mariner I started losing power. I noticed that the primer bulb was totally flat like plastic bottle that someone sucked the air out of. Any ideas about what is going on?
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    Battery placement

    I have a 17 foot Tracker with 3 batteries. Right now I have 2 in the front at the bow and 1 in the back. I was wondering if it would be better to have all 3 in the back of the boat.
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    Max spark advance 75 horse Mariner

    Can anybody tell me the max spark advance on a 1988 75 horse 3 cylinder Mariner. The manual I have says 2 different things in 2 different parts of the book. When I set the timing, do I set it at less than what the manual says or right at the number?
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    75 horse Mariner throttle adjustment

    Took my Tracker out last weekend to run my motor and it ran very well. But I noticed on a long run at wot, the motor started running a little rough and cut off when I put it in neutral. I noticed gas dripping from under the cowling. I detached the fuel hose, started it up again and it ran smooth...
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    Primer bulb hardness

    I have a general question about my primer bulb. When I am about to start my 75 horse Mariner for the first time of the day, how hard should I squeeze the primer bulb. I was told by someone that I shouldn't get it as hard as I can but firm enough to get fuel in the carbs. Does anybody out there...
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    1988 75 horse Mariner running rough on long runs

    My 75 horse Mariner will start to run rough after a long run across the river or lake. It starts to slowly lose power and will shut off after I take it out of gear. When I detach the fuel line it will start back up again and run fine. I also noticed when I winterized it it ran smooth as silk...
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    What is the best 2 stroke oil?

    What is the best 2 stroke oil for an oil injected 3 cylinder 75 horse Mariner
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    Timing for 1988 75 horse Mariner

    Can anybody tell me the correct max advance timing for a 1988 75 horse 3 cylinder Mariner? The Seloc manual shows two totally different numbers.
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    Timing adjustment on 1988 75 horse Mariner

    According to my Seloc manual the maximum spark advance cranking timing is 30 degrees BTDC. The WOT timing is 27 degrees. What number do I actually set it at?
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    Replacing prop on 75 horse Mariner

    I am looking to replace the prop on my 17 foot aluminum Tracker V-bottom. Right now I am running a 13 1/2 X19 stainless prop. at WOT I am running at about 5500 rpm at 35 mph according to the gps. The recommended WOT range is 4750-5250 which. If I go to a 23 pitch would I get enough...
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    75 horse Mariner vs 90 horse Mariner Specs

    While looking at the spec sheet in the owners manual for my 1988 75 horse Mariner, I noticed that the specs for the 75 horse were the same as the 90 horse except for the WOT rpm range. The 75 horse is 4750-5200 rpm while the 90 horse was 5000-5500 rpm. What is the different about the motors...
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    Spark advance adjustment 75 horse Mariner

    After switching to a 21 inch prop from a 17 inch prop I lost a few hundred rpms on my top end. What I was wondering is would adjusting my spark advance arm gain me those rpms back? Would I risk damage as long as I stayed in the maximum rpm range?
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    1988 75 horse Mariner still wont run PLEASE HELP!!

    I just pulled the #2 carb on my motor because I couldnt get any power out of my #2 cylinder. After alot of cranking I was able to get it going. I pulled the wire off of #2 plug and there was absolutely no change in how it ran. I know I have spark and compression on that cylinder. The reed...
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