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  1. sam751

    12.9 seized steering tube !

    Is this a tiller steer motor? It may be suffering from salt water corrosion.
  2. sam751

    Early Honda B100 10 Horse Rough running

    Thanks alot for the info jgmo! I drained lower cowl which looked to be mainly water, but with some oil mixed into it. I will try to do a visual inspection while running to see if it helps. The rear lower portions of the powerhead show some oil, thought I recently had the valve cover off, so not...
  3. sam751

    2003 Tohatsu 18 4 Stroke Oil Light Cold Starts

    Yes! I found out the sensor threads into the block. I did take it off and shot carb cleaner inside of it before wiping it with a clean mechanic paper towel. Not sure if that was a no-no haha! It seemed to help make it not as frequent, but it still occurs. I'm wondering if this part is due for a...
  4. sam751

    Early Honda B100 10 Horse Rough running

    Hi everyone! I was hoping to add a close to this issue of the project. As simple as it sounds, the carb needed to be clean very VERY thoroughly. This included sitting in a fresh ultrasonic cleaner solution for two 30 min rounds at 50 degrees C. Then I rinsed it with water and shot briefly with...
  5. sam751

    2003 Tohatsu 18 4 Stroke Oil Light Cold Starts

    Hello everyone. I have a 2003 Tohatsu 18 4 stroke short shaft electric start. I've done a good amount of work to get it running nicely since I first got it in 2024. But this is the first 4 stroke outboard I've really worked on. And since the day I got it, it would sometimes start cold with the...
  6. sam751

    Early Honda B100 10 Horse Rough running

    I appreciate that. When I get the chance, the head will be coming off. I do have a newer b75 with the cdi ignition that seized and I might be able to make parts of. It will be a good learning experience as I only ever went into two strokes this extensively.
  7. sam751

    Early Honda B100 10 Horse Rough running

    I added new gaskets to the intake and exhaust housing. I adjusted the valves to 0.004in. It is doing the same thing. It runs the same. One thing I forgot to mention is that the carb that came with the engine was broken but I sourced one from a 7.5 parts motor. Are these carbs too different...
  8. sam751

    Early Honda B100 10 Horse Rough running

    I’m not too keen on removing the head and sourcing a new gasket but I will keep that idea in mind. Can you go over what you mean bulky “Overhelaming”? If you mean overheating than no, I believe it is staying in operating temperature. It is peeing a strong stream. I did end up replacing the...
  9. sam751

    Early Honda B100 10 Horse Rough running

    Okay. I believe the timing is right since I had it idling. I went into the valves today and adjusted to 0.003 inches with the feeler gauge. They seemed too tight before I started. When I fired it up, it seemed I had solved the problem. When I took it to the water, I worked the throttle up and...
  10. sam751

    Early Honda B100 10 Horse Rough running

    Thanks for the info! It seems like a sweet old engine and really wants to go. When I was able to get past the rough hesitation, it topped out around 17 mph on my 14 ft gregor boat! About 1 mph slower than my 15 horse Chrysler, with slightly less power down low but close. I always wanted one of...
  11. sam751

    Early Honda B100 10 Horse Rough running

    Hi everyone. I have what appears to be a late 70's early model honda 10 hp with the points ignition as opposed to the cdi ignition. It is only wanting to idle but inconsistently able to reach max rpm if I ease into the throttle. If I try to throttle it too quickly from idle, it will bog and...
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