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25hp Johnson won't idle and fouls plugs
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<blockquote data-quote="Pappy" data-source="post: 225959" data-attributes="member: 3278"><p>One of the biggest items that has not been mentioned so far is the need to check the thermostat on that engine. That engine needs to run nice and warm at idle. Should be around 135f at idle. You should be able to place your hand on the top of the head while idling and only hold it there for 3-5 seconds.</p><p></p><p>To the fellow that has the 100:1 engine. There was a service bulletin that went out years ago retracting that ratio. You should be running at 50:1 in that engine. Off season storage and lack of usage promoted internal rust due to the very thin film of protection on that ratio and generated higher wear when the engine was put back into service.</p></blockquote><p></p>
[QUOTE="Pappy, post: 225959, member: 3278"] One of the biggest items that has not been mentioned so far is the need to check the thermostat on that engine. That engine needs to run nice and warm at idle. Should be around 135f at idle. You should be able to place your hand on the top of the head while idling and only hold it there for 3-5 seconds. To the fellow that has the 100:1 engine. There was a service bulletin that went out years ago retracting that ratio. You should be running at 50:1 in that engine. Off season storage and lack of usage promoted internal rust due to the very thin film of protection on that ratio and generated higher wear when the engine was put back into service. [/QUOTE]
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25hp Johnson won't idle and fouls plugs
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