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    1992 mercury 25 cutting out.

    Hey. I have a 1992 mercury 25 that i just put a new switchbox on. It has mechanical timing advance. It starts up and idles great but when i increase the throttle it dies. At first i thought cdi may have sent me the wrong switchbox but i swapped it for a mallory and it does the same thing...
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    mercury 25 killing at half throttle

    Hello, I have a 1991 mercury 25. The switchbox went bad and i replaced it with what cdi said is the correct replacement pack. My problem is that the motor starts and idles just fine but when i reach about half throttle it cuts out. My motor has a mechanical timing advance and if i unhook to...
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    25 mercury electric start just clicking

    Just put electric start on my 1992 merc. When i first put it on and hit the button something smoked so i let off and disconnected the battery. After checking all the connections i retried it and it just clicked. The motor still started fine with the pull start, although it would cut out at...
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    mercury 25 stator/flywheel compatable?

    Hey, i have a 1992 mercury 25. I recently put electric start on it and swapped my non-ring geared flywheel for one with the ring gear. My motor has the black stator on it but the new flywheel i am using has a 4 magnet setup instead of the 2 magnets like my old one. Do i need to put the red...
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    1992 25 hp mercury electric start conversion help

    Hey, I am trying to convert my 1992 pullstart merc to electric start using parts from a junk 1999 model. To this point i have: Swapped flywheels (the newer flywheel has the ring gear) mounted the starter Mounted the rectifier Mounted the solenoid As far as wiring goes i have: wired up the...
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    mercury 25 side shift conversion

    Just a curious question here. I have a 25 merc with the factory shifter in handle. I love the shifter but when its cold it can be a real pain to idle sometimes. I happen to have a tiller that i bought with a pile of parts that is mercury tiller but has a conventional throttle only handle. I...
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    1999 25 mercury part out?

    Hey everyone, I have a 1999 25 2 stroke merc that has bad compression in the bottom cylinder. To rebuild it is gonna be about 800 bucks. My question is am i better off breaking the motor down and parting it out on ebay or elsewhere? I have another motor and gave 150 bucks for this one just for...
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    best gasket seal?

    Hello, I am about to put my powerhead back on my 25 hp mercury. What is the proper way to seal the gasket between in and the stump? I have the actual gasket but was wondering if i needed to apply and gasket seal along with it for a good bond with no leaks. What is the prefered brand and...
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    25 mercury with no fire, stator and trigger testing results included. switchbox?

    Hello, First off thank you for reading this thread. the forum has already helped so much. My motor has no fire getting to the coils It is a manual start 1992 Ran test on the stator and trigger and the results are as follows (im not sure if i had all the settings just right on my meter...
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    Mercury 25 kill switch wiring question

    !992 25 merc. Pull start only What is the proper set up for the kill switch(es) wiring. I know that the bullet connector from the kill switch wires to the coordinating wire on the switchbox. My question is what is the proper wiring for the two grounds that are on the kill switch harness. I...
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    mercury 25 electronic switch over

    this is kind off a 2 part question. First, I have 2 25hp mercs. 1 is a 1992 model with the older electronics and linkages, the 2nd is a 1999 model with the new switchbox and has electric start etc. The 99 blew the bottom cylinder (common as we all know)... 1992 motor has a broken lower unit...
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    mechanic issue

    Hey everyone, I am having an issue with a mechanic that was reccomended to me. About 5 month ago i dropped off an outboard motor that wouldnt run. He seemed very knowledgable etc, well after taking him a couple various parts for a month or so he said he had it running and would bring it up...
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    mercosil rebuild worthwhile?

    Hey, I have a 1999 25 hp merc. I bought 2 complete motors in cosmetically perfect shape with good lowers etc for cheap. I parted the deeply scared cylinder motor but the other one is still running but is basically dead with 60 lbs on the bottom cylinder. I have been offered 500 hundred...
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    25 hp Mercury switch box question

    Hey Everyone, I have a 1992 25 hp merc and it no longer fires. I just happen to have a bunch of parts laying around so after i checked the kill switches i replaced the stator. It ran fine for about 10 minutes then died and once again have no spark. After this i took it to a local mechanic to...
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