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92 V4 120 hp Johnson why is she overheating?
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<blockquote data-quote="Pappy" data-source="post: 284116" data-attributes="member: 3278"><p>Make sure you have a good volume and pressure supply to the gearcase to cool the engine on a hose. </p><p>Second. Remove the thermostat assys. and covers and leave them off.</p><p>Start the engine and observe water flow. </p><p>Does the water flow look uniform on both the port and stbd. side? Is it overflowing and running down the cylinder heads on both sides or just one?</p><p>Are you hearing a hot horn or just guessing that side is running hot? </p><p>At around 135F you should be able to hold your hand on the top of the cylinder head for no more than a few seconds. Both cylinder heads should be gettng to this temperature on the thermostats. If you can hold your hand on the port head for longer then it is not warming up.</p></blockquote><p></p>
[QUOTE="Pappy, post: 284116, member: 3278"] Make sure you have a good volume and pressure supply to the gearcase to cool the engine on a hose. Second. Remove the thermostat assys. and covers and leave them off. Start the engine and observe water flow. Does the water flow look uniform on both the port and stbd. side? Is it overflowing and running down the cylinder heads on both sides or just one? Are you hearing a hot horn or just guessing that side is running hot? At around 135F you should be able to hold your hand on the top of the cylinder head for no more than a few seconds. Both cylinder heads should be gettng to this temperature on the thermostats. If you can hold your hand on the port head for longer then it is not warming up. [/QUOTE]
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92 V4 120 hp Johnson why is she overheating?
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