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Recent content by SDTohatsuM5B

  1. S

    5 hp two stroke problem

    Further testing today. Fuel system flows very freely, and new carb made no difference. Today i tested the exciter for ac voltage when cranking, spec is 100-150 volts but i only got 50-60 volts. As the 5hp motor has no electric start i removed the plug and gave repeated strong pulls on the...
  2. S

    5 hp two stroke problem

    Thanks for the reply Paul. Any thoughts as to why the motor will start easily, run well for extended periods at low revs, but die if run at 75% throttle for a few minutes? Steve
  3. S

    5 hp two stroke problem

    Reviving an old thread as i have similar issues. Engine runs well for about 5 mins then dies, might restart straight away but barely, will restart and run well after a break. My check values very similar to above ie : Primary 0.4 Secondary 6.41k Exiter 121 Sensor 101 My question : Is the...
  4. S

    Nissan 5HP 2-stroke NS5B strange running issue

    Thanks for the update. My issue isnt water or ethanol related as it’s the same with fresh non-ethanol fuel. I’ll check all the resistances at the weekend. PS, as a hobby i rebuild old motorbikes so am very familiar with carbs and electrics, just not 2-strokes! One other thing to check is the...
  5. S

    Nissan 5HP 2-stroke NS5B strange running issue

    I have a very similar issue. M5b will run great for about 5 mins, but after that it dies and won’t restart, or if it does restart it wont rev. I’ve replaced the carburettor too, made no difference. So am wondering if an ignition component is failing when hot ?
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