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  1. M

    Mercury 1985 4cyl 75 hp missfire

    Hi all, Ive noticed something on my engine that it wasn't doing before. For the first say 10 secs of starting it up from cold it sounds like its loosing its spark and running on 2-3 cylinders and I have to throttle up for it to stay running. BUT it only does this for the first 10-15 secs of...
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    Kiekhaefer 3.9 needle bearing selection..

    Hi all, rebuilding this little engine and went to my local bearing shop in search of a new needle bearing roller cage for the top bearing carrier....(the one that sits in between the top roller bearing and top oil seal) Now mine is ORIGINAL from 1966 and its not it bad shape but thought I'd...
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    Mariner 4hp HELP ME BEFORE I GO MAD!

    Hi all, I have this Mariner 4hp (Yamaha engine) from 1986 model number 6EO and its driving me MAD!!!!.......:mad: Ever since I got it, it wouldn't run without the choke half way out. Easy, I thought, clean and rebuild car. Well after the 3RD carb clean and rebuild, its still playing stupid with...
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    Kiekhaefer mercury 3.9 steering column stuck!!

    Says it all in the title really!!! I've literally just bought this mid 60's vintage Mercury 3.9 hp (very rare here in UK) and the steering column appears to be siezed up. Everything else seems nice an original and as far as I'm aware, has been a fresh water only engine. Now what I would like to...
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    Kiekhaefer engine timing marks..

    Hi all, I have been doing some searching on here and read that apparently there was a bulletin a few years ago stating that my max advance on my 1985 4cyl 75 hp Kiekhaefer engine should be reduced to 23 degrees BTDC rather than the factory set 27 degrees BTDC. (Something to do with the lower...
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    Mariner 4hp 2 stoke

    I have got this mariner 4hp (same as yam 4hp) 2 stroke from the 1980's and its driving me MAD!!:mad: It starts, stop and idles just fine. The problem is that sometimes when I put it into gear and accelerate it just bogs down BUT it only does this half the time. Thats the wierd thing... Its...
  7. M

    OMC 4 hp pistons

    Re: OMC 4 hp pistons I decided to be the pistons anyway they were so cheap, I was worth a chance. Anyway, thanks to everyone that commented in an effort to help me out... Best regards, Marc.
  8. M

    OMC 4 hp pistons

    I have and old 1970's 4hp Johnson that I bought that had been badly maintained and as a result sufered a scored piston resulting in low compression and lack of power....:mad: Anyway from what I remember everything else was fine as regards to ignition, carb and gearbox etc so the only thing to do...
  9. M

    Old style Mercury/quicksilver twin bladed prop

    Hi all, there is a marine dealer in the u.k at the moment that is selling off all his old stock of the "old school" Kiekhaefer twin bladed ally props cheap. They are the 15 spline ones. My question is: My engine is a 1985 75hp 4 cyl Mercury (last of the Kiekhaefer based straight 4's) and I need...
  10. M

    What year did mercury change thier 4hp engines to stainless driveshafts...

    Hi all, Sorry haven't posted for a while on here but been too busy fishin' :D Anyway, as tittle states I'm after a good 4/4.5 hp gearbox that used the later stainless steel drive shafts and shift shafts. From experience most of the ones I found that were made in belgium had stainless...
  11. M

    Mercury 4hp gearbox.

    Re: Mercury 4hp gearbox. YES!!! I found the leak!!! Just rigged up a home made pressure kit (couldn't wait till morning!) and found the strangest thing. Its not actually a seal thats gone really but where the top shift shaft oil seal is, it sits in an alloy housing and is leaking where that...
  12. M

    Mercury 4hp gearbox.

    O.K I bought this secondhand gearbox. Got it home and realised it was in worse shape than what the guy had said. Pressure tested and shift shaft oil seal and drive shaft oil gone. I replaced them for new ones. Filled the oil back up with the blue quicksilver stuff and took it down the river for...
  13. M

    1986 yamaha 4hp fuel pump

    Hi all, just taken the fuel pump for the above outboard engine (integral fuel tank model) and when taking out fuel pump, two little springs and a small disc came out. Now my question to all you wonderful people out there is does anyone have a parts diagram for this said fuel pump and location...
  14. M

    is it me or is quicksilver phatom black useless

    Right. I had nothing but problems with this stuff and trying to get it to form a decent topcoat. First time round I used the light grey primer and phantom black on top and it looked good but would scratch real easy. :redface: figured coats went on too heavy or something... Now couple years...
  15. M

    Mercury 1967 6hp kiekhafer

    Hi all, Got a longshaft version of this engine that just doesn't seem to want run right. (different engine than my other post) Anyway it seems to run smoth on idle even in gear loads up but when you give it more than1/4 throttle just bogs down and splutters. I rebuilt carb, and adjust correct...
  16. M

    Mercury paint job.

    Hi all, Currently restoring a 1965' 6hp kiekhaefer twin cyl. For the paint job: ALL back to bare metal, nice and clean. 50/50 white vinegar and water. clean with fresh water. 2K (2 pack or 'catalyzed') aircraft grade zinc chromate primer. Cured for 24h 3 coats of mercury phantom black -...
  17. M

    Mid 60's Mercury/kiekhaefer small engines- 6hp,9.8hp

    Hi all, Just a quick one concerning all the small engined kiekhaefer's of around the mid 60's. Basicly for some reason the inlet side of the engine block and all the ones I have get hot. I mean like real hot after 5mins of running in a tub of water I can't put my hand on the inlet side of the...
  18. M

    Mercury Phatom black paint

    Hi all, As stated I am in the process of respraying my 67' 3.9hp. Now I have sanded it down with wet and dry paper. Then thin layer of zinc primer. Good rid of all imperfections and re primed in quicksilver zinc primer. Now I have just put a layer of phatom black on. On the smaller parts I...
  19. M

    Respraying a 1967 kiekhaefer 3.9hp help please

    Hi all, As stated I am in the process of respraying my 67' 3.9hp. Now I have sanded it down with wet and dry paper. Then thin layer of zinc primer. Good rid of all imperfections and re primed in quicksilver zinc primer. Now I have just put a layer of phatom black on. On the smaller parts I...
  20. M

    Mercury 7.5 tuning

    O.k folks I have a 1985 Mercury 7.5hp I have just tuned. It starts ok from cold and accelerates just fine when underload. However when warm, doesn't like to be restarted and when it does, backfires once before it does. I'm thinking carb is slightly too lean/rich?!! Any suggestions much...
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