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Typical Motor Temperature??
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<blockquote data-quote="Pappy" data-source="post: 357403" data-attributes="member: 3278"><p>Actually, almost all carbureted Johnson/Evinrude thermostats are set to open around the 130-135F range. Should they fail they are also designed to fail in the open position!</p><p>You engine should idle around that range. Temps are taken at the top of the cylinder head. This may be why we are seeing different temps being reported. </p><p>The engine by-passes the thermostat altogether when rpms are increased. Water pressure supplied by the pump is increased and it blows open a large pressure relief valve built into the system. Once this opens (usually while you are planing off) the engine should cool down to around 100f or so depending on your water temp in your area.</p></blockquote><p></p>
[QUOTE="Pappy, post: 357403, member: 3278"] Actually, almost all carbureted Johnson/Evinrude thermostats are set to open around the 130-135F range. Should they fail they are also designed to fail in the open position! You engine should idle around that range. Temps are taken at the top of the cylinder head. This may be why we are seeing different temps being reported. The engine by-passes the thermostat altogether when rpms are increased. Water pressure supplied by the pump is increased and it blows open a large pressure relief valve built into the system. Once this opens (usually while you are planing off) the engine should cool down to around 100f or so depending on your water temp in your area. [/QUOTE]
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