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  1. nickb911

    Mercury prop

    Spun/rotted-all-to-hell prop hub on my 1984 Merc 7.5. Prop is old and beat up anyhow. Anyone know where I can find a prop for this motor? I've been desperately searching all over. Michigan wheel didn't seem to have my model/year. I'm dead in the water here. Prop serial # is 48-47670-7 THANKS
  2. nickb911

    mercury prop

    I figure I have a spun prop hub. 1984 7.5 merc, runs great, but kept slipping and revving up to high heaven at high then later on, slow speeds even. The rubber inside the sleeve inside the center of the prop was all rotted away when I took the prop off. My questions are: Do I need to replace the...
  3. nickb911

    Engine "Kicks" at idle

    My little 1981 7.5 Merc. was running great thanks to this forum:). At the end of the day today, it started to "kick" during low speed idle. Mostly in neutral, once or twice at very low speed forward while putting on trailer. Doesn't seem to want to stay idling in neutral unless I give it...
  4. nickb911

    still fiddling with fuel pump

    Does anybody know where I can find a diagram of a 1981 Merc 7.5 fuel pump? I need to check which gaskets go where. Ahhh, the fish are biting too! Thanks.
  5. nickb911

    Fuel pump?

    7.5 merc motor not running at consistent RPMs (slightly surging) After ~2 minutes at WOT, will die unless I squeeze the primer. If I give it a squeeze every couple minutes no prob. Does it sound like I need to replace the fuel pump diaphragm and gaskets? Tank and line assembly already...
  6. nickb911

    water water everywhere

    1981 7.5 merc Water is seeping/gushing from head gasket. Tried to unscre bolts to remove because Plugs have some sort of dark debris on them. I suspect very worn rings. Now a bolt is broken off in the head. Cannot remove without taking to a shop. What should I look to replace, head...
  7. nickb911

    fuel leakage 1981 7.5

    After pulling starter cord once with choke on, releasing the choke causes a little fuel to spill from front of carb. Any ideas? I recently installed a new float and needle. Did I not position the float properly?
  8. nickb911

    The little outboard that (almost) could...

    1981 Merc 7.5, Randomly dies @ WOT after about 2 min. Fires right back up w/o choke. Did this twice today. If I catch it and throttle back it may stay running, primer bulb is firm. Fuel was low, maybe it momentarily sloshed away from the pickup hose in the tank? Could this be some sort of...
  9. nickb911

    7.5 merc lacking power

    After much effort, it's running reliably (for now). However, seems to be lacking top end. Could a slight air leak cause this? One of the gaskets on the fuel pump is old and brittle. Also, prop is old and looks pretty dinged up. I'm thinking of replacing. Will it really make a difference...
  10. nickb911

    plug gap 1981 7.5 merc

    Got my motor running (almost) right finally. Started and ran fine until it died at WOT and seemed to be slightly surging before that. Primer bulb is still firm and fires right back up with choke ~1/2 out. Only died on me once today! That's a record for this season for me. My main question...
  11. nickb911

    1981 7.5 merc killing me

    I'm at my wits end. Carb is clean, plugs are new, tank and fittings clean and new. Ran perfectly last year. This year... Trying to start: Choke and pull, release choke and pull, fuel pours from front of carb. Replaced needle, float looks good. Sometimes starts, usually not. When...
  12. nickb911

    1981 7.5 merc dies when put in gear

    I had trouble earlier this year. Cleaned and rebuilt carb. Did not replace float or needle though. Last time out: several times died at WOT after about 3-4 minutes, then would restart. Also slight surging. This time: new gas/oil mix and new plugs (properly gapped) Ran fine in test tank...
  13. nickb911

    1981 7.5 Merc. dying at WOT

    The other day it wouldn't start. I cleaned the carb. Using aerosol cleaner and taking everything apart that I could, I didn't see any gunk come out, and it looked clean inside. Could not/did not remove/poke through the nozzle/jet at the bottom coming up from the float bowl. DID spray cleaner...
  14. nickb911

    1981 Merc. 7.5 won't start

    Bought this in June last year. Ran fine all year. Stored it inside for "most" of the winter, without winterizing. (Mistake # 1, now I know better) Ran one time this year with old gas/oil mix from last fall. It ran with a little coughing, but ran all day. (Big mistake #2) Next time out...
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