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  1. K

    Intermittent Spark on 1988 80HP Mercury Outboard - Mechanic believes switchbox

    1988 80HP Mercury Outboard 3 cylinder B373411 Local boat shop is doing an annual tune-up on my boat and said yesterday it was working fine but when they went to adjust the timing, they were getting no spark or intermittent spark on plugs 1 & 3. They have done some trouble shooting and believe...
  2. K

    Accessory switch for 1988 Conquest Runabout

    Hi. I have a 1988 Conquest 17' Runabout with a 1988 80 HP Mercury Outboard. On the dash, there is a fused switch that says ACC. Power comes into the fuxe, then through the switch and the switched power is a purple wire that in bundles with other wires going along the side to the transom. I...
  3. K

    Damaged Horizontal Fin on Outboard Motor - General Question (newbie)

    I apologize ahead of time if I am posting in the wrong forum. I was trying to find a way to ask a large audience for advice rather than just asking questions about my specific Mercury motor. In dropping the lower unit on my Mercury outboard, I accidently chipped off a small section of the...
  4. K

    To Tune or Not to Tune...that is my question...1988 80 HP 3 cyl O/B (Newbie)

    I have posted a few other questions regarding this motor (1988 80HP 3cyilnder SN B373411) and have received some great help. I was able to fix the streeing and I am working on replacing the impeller. I am comfortable doing repairs but I don't have a ton of time to tinker due to having two...
  5. K

    1988 80 HP 3 cylinder O/B - lower unit stuck

    I am trying to replace the impeller on my 1988 80 HP 3 cylinder O/B. I took out the (5) bolts and the 2 back ones (nearest boat) were a little tough to get out. I put it in forward per my local mechanic so everything stay aligned but I read online that neutral was needed to it doesn't bind to...
  6. K

    Alarm during idle with 1988 80 HP MErc Outboard (newbie)

    When I first get the boat in the water and run a low speed for a while, I get an alarm but it is not constant. It chirps a bit and goes off. Sometimes it may alarm a bit longer but goes away especially if a throttle up a bit. The mechanic said it sounded like it was overheating and the water...
  7. K

    Steering frozen on 80 HP Merc 1988 (Newbie)

    Hello. I used to live on the East Coast and ran my boat every summer since I got it 5 years ago until two summers ago when I moved. I have not had much time to devote to the boat until now. I got this boat 5 years ago and have been slowly learning about how to fix things (gas guage, pinot tube...
  8. K

    Can't find Serial Number on 80HP, oil injected two stroke - believe it is 1988

    Everyone tells me that the serial number is located on teh transom mount for my engine but I have looked all over and can't find a plate. I believe it is a 1988 80HP oil injected two stroke. Any suggestions on where to look? Thanks Scott
  9. K

    Mercury OB runs for longtime then suddenly dies and won't restart

    I have a 1988 Mercury 80HP Oil Injected 3 cyl OB engine that starts reasonably well, runs fine but if I am in teh river and need to run it at low speed for a while it will suddenly die and I can't restart it. The first time we were idling or running at headway speed for 20 minutes and it just...
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