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  1. M

    Yamaha 85 tach quit?

    I have a 1995 Yamaha 2 stroke with a Yamaha multi function tach that i installed 3 years ago. It has worked perfectly for 355 hrs. Today i wanted to get the hrs off it and when I turned the key on it wouldn't come on. I didn't remember turning the batt power off so I hit the tilt switch and the...
  2. M

    Which wire for the tach light?

    I have a Yamaha 85hp outboard and I hooked up a Yamaha multi function tach that works great but I need to know which wire is for the internal Light. I would like to hook it up to my Nav light switch. Someone told me I was sol because the multi function tach would'nt work with the 85 but they...
  3. M

    Yamaha 85 temperature

    Hey Guys, What temperature should a 1995 85hp Yamaha run at at cruise speed? After running at cruise, I could take the cover off and put my hand on the cylinder head and keep it there. Seems it should be running hotter than that. I have a little gadget that I can point at it and push a button...
  4. M

    85 hp yamaha-Run it out of gas or not?

    My mechanic said I should always run it out of gas when done for the day. I use the boat almost every weekend during the summer. He said the gas will evaporate from the carbs in a few days and leave the oil and that could be causing a carbon build up. I've also heard one cyl could run lean when...
  5. M

    Yamaha 85 runs rough at idle?

    My 1995 Yamaha 85 runs rich at idle up to 1300 rpm and runs great after that up to WOT of 4500 rpm. It will foul plugs after 25hours or so.I do troll a lot but at 1700 rpm. I don't spend much time near idle. 1. had the carbs adjusted and timing checked. They also did a de-carb. The compression...
  6. M

    1995 Yamaha 85 fouling plugs

    After about 25 hours on a set a plugs they will foul while trolling. I fish off shore here and do a lot of trolling at 1800 Rpm. should this engine be able to troll all day without this happening? I just got it back from the shop and they said it checks out other than doing a de-carb. I'll have...
  7. M

    Max RPM?

    I have a 1995 Yamaha 85 two stroke on a 17 foot glasspar that weighs about 850lbs with no motor on it. It has a 13.25 x 17 prop. I just installed a tach and was surprised to find out it only turns 4000 rpm at WOT. Is it possible the tach isn't correct. What rpm would one think it would turn with...
  8. M

    What gauge batt cable for my Yamaha?

    I just mounted my 1995 Yamaha 85 and was wondering what gauge batt cable Yamaha recommends. The rubber block at the front isn't that large so the cable can't be that large.
  9. M

    Yamaha 85 bolt pattern template?

    I'm almost ready to mount my C85. I've heard they make a template for the bolt pattern. Where do I get one? Do people just hang there motor by a hoist and just hold the motor and drill. It seems that not a very accurate way to do it. I've never hung a motor. Please help.
  10. M

    Yamaha 85 bolt pattern template?

    I'm almost ready to mount my motor and was told the best way to mount it was to use a template for the bolt pattern so when I drill the transom the holes are perfect. Where can I get one?
  11. M

    Which Tach for a Yamaha 85?

    I have a 1995 Yamaha 85 outboard with a new 703 side mount shifter. C85TLRT I would like a Yamaha multi function tach with hour meter and over temp. Can anyone tell me which one I need?
  12. M

    What's a 1996 Yamaha 85 worth?

    Hey Guys, I'm looking at a 1996 Yamaha 85 that's in excellent condition. It has low hours and almost all of it is in fresh water. He wants 2500.
  13. M

    Yamaha 85 and 90 difference ?

    I've been looking to buy a Yamaha 90 two stroke but found a clean 85 and wondering what the difference is. This 85 doesn't have oil injection and was wondering if that's the only difference. He thought the lower unit might be different. Does anyone know? He called it a commerical 85. Thank You
  14. M

    Yamaha 90 cylinder bore question

    I'm looking to purchase a Yamaha 90. This guy works out of his Garage and seems to know what he's talking about. He replaced the bottom piston with new and the other pistons were fine so he left them alone. The top cylinder was a stock bore with the middle cly being bored 020' over and the...
  15. M

    1995 johnson 90 Oceanrunner questions?

    I'm going to look at one today. What's the history on these motor's? Have they been good motors or do they have any history of being trouble? What does Oceanrunner mean? Do they have more corrision protection? Does anyone know what it weighs? Where can I look to get info on it? It has 120hrs...
  16. M

    1964 Merc 650 Powerhead removal?

    I can't post pictures but under the small wrap around cowl there are some nuts that you need to take off to get the powerhead off but there are also screws in there. Do any of these screws need to come out. I got two long ones out on the right side but can't seem to be able to get anymore out...
  17. M

    1964 Merc 650 lower unit removal?

    I took off all the nuts and the bolt that holds the zinc on but it's on there. Is there anything else I need to loosen up? Do I need to do anything with the shift tube? Thank You
  18. M

    Yamaha 90?

    I've been looking into buying a Yamaha 90 for my 17' glasspar. Anyone have any pro's or con's with this motor. I had a 130 Yamaha some years ago and had zero problems with it. Thanks:)
  19. M

    Merc Experts

    Is there a good book out there about MERC Outboards that gives specs such as HP,Weight,Yr's ? I just want to learn more about the different models. I have a 1964 Merc 650 that has a dead cylinder so I'm going to part it out. I've owned Evinrude,Johnson and Yamaha outboards and this dead merc...
  20. M

    64 Merc 650 Zinc Removal?

    Can someone tell me what tool is used to remove the bolt that holds the Zinc on? Is it a allen. I can't see in that little hole to tell. What size it is would help too. Thanks a bunch. mike
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