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  1. scout-j-m

    1982 Mercury 9.8 Coolant Passage Blockage

    I have seen zero corrosion on this motor. I'm far enough away from the coast no one ever mentions it when they sell/buy. When I had the powerhead off to replace the water tube grommet the whole area within the exhaust and mating surfaces was just carboned over but not even too bad in that...
  2. scout-j-m

    1982 Mercury 9.8 Coolant Passage Blockage

    I pulled the lower tonight. Nothing seemed to stand out aside from the plastic inlet tube/sleeve the copper water tube uses as a guide to seat down on the water pump outlet seal. Put the lower in neutral and submerged in a 5 gal bucket and used my 24v drill to turn the driveshaft. Had water...
  3. scout-j-m

    1982 Mercury 9.8 Coolant Passage Blockage

    I'm bumping this because in typical fashion the motor took a backseat to other projects. I got back on this 9.8 a few weeks ago, cleaning the carb again and trying to get the throttle linkage working smoothly. I had to pull the flywheel and remove the trigger and clean and grease all of the...
  4. scout-j-m

    Carb Roller Part # for Yamaha 25ESD

    Small update. I found the roller labeled on another parts site in the carb section schematic. On there it is called "Collar and stopper set" with a current part number of 99999-03499-00 and a superceded part number 6L2-14578-00-00. It's a hefty $38 there and maybe a few bucks cheaper other...
  5. scout-j-m

    94 15 yammy

    Definitely appears to be unburnt oil. It's also in a location that should be the path for your thru-hub exhaust. In my experience this happens after running it on muffs for a long time as the engine has no exhaust back pressure or resistance from a the prop in water. I'd say you have nothing to...
  6. scout-j-m

    Carb Roller Part # for Yamaha 25ESD

    Not a bad idea. I imagine a number of things could be made to work. Just need to match O.D. and I.D. so it fits on and then gives the same kinematics as original setup.
  7. scout-j-m

    Carb Roller Part # for Yamaha 25ESD

    I'll call and ask my dealer if they have any of these instead of buying it online. That way I can bring my lower carb up there and compare before I buy. Closest dealers are about 40 min from me but I do pass near one on my commute to work....but I've been working remote since Covid so haven't...
  8. scout-j-m

    1994 Yamaha 30 horsepower outboard motor/ power tilt ?

    I have the Panther 55 Model and I am not a fan. Its a mechanical linear actuator as opposed to a hydraulic cylinder. Works ok but it's slow and it seems like a failure waiting to happen if water gets in there. At least with hydraulics you can rebuild yourself without too much trouble. On the...
  9. scout-j-m

    Carb Roller Part # for Yamaha 25ESD

    Yeah I would assume larger motors would need larger rollers but my experience is mostly limited to 40hp and below outboards. To my knowledge, you just pry the old roller off and the new one can be pressed on. Never had to mess with a Yamaha roller though. The OMC rollers I've changed were all...
  10. scout-j-m

    Carb Roller Part # for Yamaha 25ESD

    I recently acquired a 1990 Yamaha 25ESD in need of a decent bit of TLC. Tinkered with it a little and one of the things I saw that it will need right off the bat is a new carb roller as it has one really bad flat spot as well as a couple more at other locations on the roller. I am not seeing the...
  11. scout-j-m

    Converted my 1999 2 stroke 9.9 to a 15hp

    Was there a restriction plate behind the carb?
  12. scout-j-m

    Corroded Yamaha 30hp Lower Unit... Repairable? Cause?

    I bought this lower unit off of a 30hp Yamaha 3 cylinder a couple weeks back in hopes I could repair it. As the pictures show, it has serious corrosion plus possibly some other kind of damage in the area behind where the trim tab anode goes. There was also no fluid in the lower unit but it does...
  13. scout-j-m

    M40D Fuel Line Size

    I have Tohatsu M40D carbs on my 1988 Yamaha 30. Until recently they had the thick black fuel line connecting them together with the fuel pump. I threw it away and put on some 1/4" ID Tygon translucent yellow line. It is now leaking at the connection to the elbows on the two carbs without the...
  14. scout-j-m

    Dual Ignition Coil Resistance Test

    Recently purchased a 1986 Yamaha 25hp, model 25SJ. Am having issues with very weak spark. I found some specs online and began testing the resistance of various parts of the ignition system. Everything checked out until I got to the ignition coil. This model has the dual ignition coil like in the...
  15. scout-j-m

    1982 Mercury 9.8 Coolant Passage Blockage

  16. scout-j-m

    1982 Mercury 9.8 Coolant Passage Blockage

    I picked up the subject motor late last summer for really cheap. Figured I'd fix it or strip it and sell the good parts. Luckily it had great compression but the CDI box was shot. I waited probably 3-4 months for the by far cheapest one online to get back in stock and got it installed and now...
  17. scout-j-m

    1986 25hp Yamaha - Model # 25SJ

    I went with a friend and helped him buy a 1986 Yamaha 25hp, manual start, short shaft, model # 25SJ. The motor had a broken recoil starter and was not in running condition so we checked spark, compression, and shifting operation along with general overall condition. We got 120 psi on each...
  18. scout-j-m

    Yamaha 30 Lower Unit Repair

    Subject motor is a 1988 Yamaha 30hp 3 cylinder long shaft. I bought it last summer with a non-working lower unit. The lower had a broken shift rod and after tearing into it found that the forward gear has one tooth completely broken off. There was also a crack and subsequent very questionable...
  19. scout-j-m

    New Multifunction Tiller to Old Outboard with 7 Pin Harness

    I have a 1988 Yamaha 30. It is a tiller but has most of the stuff already installed to be a remote motor. One of those things includes the remote 7 pin wiring harness. Right now the wiring harness goes to a electrical junction box mounted on the transom which houses the key and emergency kill. I...
  20. scout-j-m

    1988 Yamaha 30 Exhaust Ports

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