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  1. J

    Motor won’t idle or run at slow speed after 30 minutes

    I have a 90 hp four stroke mercury. While in the slip, I can start the motor and it will run great for about 30 minutes. After about 30 minutes at idle it starts shaking and dies. When I try to restart it it will only run a few seconds before it dies again. If I run at a slow speed for a while...
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