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Recent content by arkansashunter

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    No Power to starter - solenoid, safety switch or fuse?

    Hey Everyone, I have a 1994 Mariner / Merc that is new too me, don't know too much about the back history other than it has really low hours and shows no physical signs of wear and tear, kinda like a barn find. Naturally it had it's fair share of dirt dobber and random nastiness inside the...
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    Low but equal compression tester readings

    Hello Everyone, I picked up a boat motor trailer combo the other day because it was just to good to pass up. The motor on it is a 94 Mariner (Merc). I've got a fair amount of experience tinkering with this era Merc and have owned and used hard a 92 25 for years. For a little background this...
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    Cooling System Cleaning Advice

    Hey Everyone, Recently acquired what appeared to be a great deal on a boat with a 25hp Johnson, changed the impeller and took it for a spin. After about 100 yards it started feeling hot then sputtered down to a rough idle. Pulled it out of the water knowing something was very wrong. Ran a...
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    1991 Johnson 25 hp Water pump question

    Hello everyone, I recently acquired a '91 Johnson 25 very very cheap with a solid boat and trailer. But as always these things come with a catch.. The guy who sold it to me was in mid process of changing the impeller but apparently got frustrated and gave up. He got as far as pulling the...
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    1992 25 mercury still 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 kills 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 merc, 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 half...
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    mercury 25 stator/flywheel question

    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 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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    25 merc 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...
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    best type of gasket seal

    Hello, Im putting my powerhead back on my motor and was wondering if there was a preferred brand or type of gasket seal to use on the exhaust gaskets where the powerhead meets the stump. Thank you
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    Merc 25 with no fire, Multimeter results, bad switch box?

    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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    25 mercury kill switch grounding.

    !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 wiring diagram

    Hello, Does anybody on here happen to have or know where i can find an online electric/ignition wiring diagram for a 1991 mercury 25 with manual start? I have a manual but it is for 94 and above and there are a few differences between them. Reason being my motor was not getting fire so i...
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