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    5.0 mercruiser lx runs at cruising speed for 5-10 min then dies

    could a bad fuel/air mixture be the reason for the stall. it almost seems like when its running cold its fine but after 8-10 minutes and the choke fully opens the air fuel ratio is off and it cuts out. Could the carb just need adjusting?
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    5.0 mercruiser lx runs at cruising speed for 5-10 min then dies

    OF 147124
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    5.0 mercruiser lx runs at cruising speed for 5-10 min then dies

    I ran the boat on an external 6gal tank with the vent wide open and same thing happened. Thank you for your reply. Could worn plugs possibly overheat and cause a misfire and stall, then when they cool down fire properly?
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    5.0 mercruiser lx runs at cruising speed for 5-10 min then dies

    I have a 5.0 merc lx in a 20ft searay, and my issue is engine runs perfect on muffs and when I get it in the water starts right up no problem. let it idle until temp reaches 130 then take off. boat will run at slow speeds for a long while, will get it up on a plane and run at cruising speeds for...
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