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Mercury 650 Thunderbolt wont start.

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  • Mercury 650 Thunderbolt wont start.

    New to boat motors- I have a 65 horse Mercury the serial shows that its made between 67-69. Its got new plugs- new fuel diaphragm- new impellor pump- new fuel tank and lines- new battery- you can hear the started spin it'll catch and turn over a few times but wont go- i heard it fire once or twice but then it would cut out... any ideas?


  • #2
    Re: Mercury 650 Thunderbolt wont start.

    I have a few threads you should take a look at..... I know how frustrating it can be.....

    http://forums.iboats.com/showthread.php?t=158086

    http://forums.iboats.com/showthread.php?t=158071
    This is a great link to boat specifications http://boatspecs.iboats.com/
    Please, shop iboats first!!

    Comment



    • #3
      Re: Mercury 650 Thunderbolt wont start.

      So I got it to run- but it sounded like idle when the throttle was full forward- sounds like the carb?

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      • #4
        Re: Mercury 650 Thunderbolt wont start.

        Manual........Compression test.... new plugs...... new impellar...... and re-build the carbs are the basics.

        Compression verifies what you are working with and you need to do a de-carb later when it is running.

        New plugs are a cheap investment to eliminate a problem

        New impellar because if it runs it needs to be properly cooled down

        Carb re-build because of the year and "unknown" history of the motor..... very good to do

        And a manual to tie it all together so you are not trying to do that stuff blind.
        This is a great link to boat specifications http://boatspecs.iboats.com/
        Please, shop iboats first!!

        Comment

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