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8hp Merc starts great cold, not so much hot.
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<blockquote data-quote="maintenanceguy" data-source="post: 468076" data-attributes="member: 24227"><p>Fuel injected or carburetor?</p><p></p><p>I'm guessing the mixture is too rich. When cold, the engine likes extra fuel - that's why carbs have a choke to block some of the air flow to increase the fuel:air ratio. But when hot, they don't like the extra fuel - which is why we don't need to choke a warm engine to get it to start.</p><p></p><p>I'm also guessing it has a carburetor and the idle air screw is turned too far out letting in too much fuel at idle. Too much fuel is good when the engine is cold. Too much fuel is not good when the engine is warm.</p></blockquote><p></p>
[QUOTE="maintenanceguy, post: 468076, member: 24227"] Fuel injected or carburetor? I'm guessing the mixture is too rich. When cold, the engine likes extra fuel - that's why carbs have a choke to block some of the air flow to increase the fuel:air ratio. But when hot, they don't like the extra fuel - which is why we don't need to choke a warm engine to get it to start. I'm also guessing it has a carburetor and the idle air screw is turned too far out letting in too much fuel at idle. Too much fuel is good when the engine is cold. Too much fuel is not good when the engine is warm. [/QUOTE]
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8hp Merc starts great cold, not so much hot.
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