Recent content by crb478

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    86 Yamaha 115 surging above 4000 rpm

    I have a 1986 Yamaha 115 2 stroke that has always been a good running motor, until now. It cranks easy, but it is down on power and when I get it up to 4000 rpm the motor will start to surge up 1000 rpm or so and them back down not running smoothly. It is also going through much more gas than...
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    Fuel sending unit / fuel float

    Hopefully this will help someone in the future. A while back I had to replace my in-tank fuel sending unit/fuel float. I took the old one out and verified that I had a 12 inch deep built in fuel tank. I drove down the road to a local marine store and purchased a replacement sending unit/float...
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    2008 Yamaha 90 4 stroke running rough down on power

    I just picked up an new boat with a 90hp Yamaha and took it out for the first time today. I left the ramp and got on plane and it was running great. I went through a no wake zone and got back on plane no problem. Went about 3 mile or so, turned around and went back through the no wake zone...
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    tips for adding a new center toon to a ponton

    I recently won a new never mounted 26.5 inch diameter center pontoon with the motor well on ebay that I still have to go pick up. I plan to mount this to my 1997 Crestliner 24 foot pontoon that has 23 inch tubes. Plans right now are to remove the engine and then the motor well slide the...
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    Which water temp switches will work for a 1985 115 Johnson

    What year water temperature switches will fit on a 1985 115 Johnson. The OEM part is 0386686 but these are hard to find or expensive. Will any other years also fit? Which year heads will fit? It may be cheaper for me to buy a pair of good used heads than to buy the temperature switches...
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    Not getting water to heads on muffs on 1985 johnson 115

    I have a new to me rebuilt 1985 Johnson 115 that is not getting water to the heads, but it is pumping a good stream of water out of the tell tale. I bought this motor from a shop that went under and it had taken a fall and cracked the lower cowling. I recently located a compatible lower cowl...
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    85 Johnson 115 Lower Motor cover/pan interchangability and replacement

    Can anyone advise me if the Lower motor covers are interchangable between the 73-77 motor style and the 79- 95 motor style? I picked up a newly rebuilt 1985 Johnson 115 that took a fall from a display stand and cracked the lower motor cover. The Upper cowl will still fit on it and latch, but...
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    Need help identifing wires or wiring Diagram

    I have a 1986 yamaha 115 2 stroke with some wires that I am trying to identify. The prior owner put this motor on a pontoon boat and tried to match up two different wiring harnesses. Right now it is really cobbed together and full of crimp on butt connectors and wire splines with several wires...
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    Drain hole in transom well

    I have a new to me 1998 Crestliner 24 foot pontooon boat with a 115 Yamaha on it. I have been slowly fixing and up grading things on it and I noticed that the transom well always has water in it. I reached under the motor and felt about a 1 1/2 to 2 inche hole at the bottom of the transom that...
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    Motor setup on a Pontoon

    I have a new to me 24 foot Crestliner Pontoon boat that has 26 inch pontoons. The prior owner switched motors on it from a 50hp to a 115. The 115 is a short shaft Yamaha 2 stroke and it is lowered down as far as it will go on the transom. The AV plate on the motor is a couple of inches above...
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    1986 Yamaha 115 2 stroke Oil level sensor popped out of main tank

    I am new to Yamaha's and when I was try to crank my new to me Yamaha 115 the battery was too weak to crank the motor. I got a jump box that was also weak and tried to start it before finally getting another battery to jump it. I took the cowl off before I jumped it and noticed that oil was...
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    Warm up lever on a 86 115 yamaha

    I recently accuired a new to me pontoon boat that has a 1986 yamaha 115 on it. This motor had recently been swapped to this boat and it still has a few adjustment that need to be dialed in to make it operate as it should. I found a 84 manual on line and ordered it to have some idea of what was...
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    Sink on Pontoon boat

    I recently picked up another Ponoon Boat, 24 foot 98 Crestliner, that has a small sink in front of the drivers console. I have not tried it out yet to see if it even works, but my real questions for those of you with sinks is what do you use them for? It seems to small to be of much use for...
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    yamaha 115

    I just got a new to me 115 out board and I can not find it listed on any parts web site. It is a 115 ETLU the teh serial number starts with 6E5 L ******. Can any one advise me what year motor I have and any special things imight want to know . Thanks
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    Stumped on 1975 115 Johnson

    I have a 1975 Johnson 115 that has been running good until the last two trips out. On both trips it started normally and I took off and ran it up to WOT at about 5400 rpm. I throttled back to turn around and the motor died. On the first trip it cranked again and I limped back home. I took the...
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