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problem w/ 98 150TLRW

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  • problem w/ 98 150TLRW

    Well, I am new here and things aren't good with my boat. I am hoping that a service guy or someone with the knowledge can help me out. Strap in, here we go...

    98 150tlrw carbed engine.

    Problem:
    Surging, at speed motor will surge. Not seeing increase on tach just in the seat of the pants.
    Bogging, at take off boat will not jump up on plane. This just started this past weekend.
    Loss of top speed, normal top speed for boat is 58-60mph, yesterday I could not get it over 50mph.
    Running rough, at idle the boat sounds rough there is a sheen in the water as if I am loosing gas or oil into the water. 2 weeks ago I cleaned under the motor in the cowell and I am not seeing any new drips.

    List of checked items and repairs.
    Carbs rebuilt last year.
    2 sets of plugs last year.
    Fuel filter replaced.
    Fuel lines checked. (no issues)
    New fuel pumps 2 years ago. (checked those and no leaks)
    Sparks coming from all 6 plugs when checked.
    New water pump this spring.

    I am not sure where to go from here... ANY help would be greatly appreciated.

  • #2
    start with a spark and compression test.
    make sure plugs actually fire,I use a Kv tester to insure firing voltage.
    then its on to fuel pumps and a carb cleaning.

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