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<blockquote data-quote="DaleH" data-source="post: 456464" data-attributes="member: 15636"><p>Over-temp at higher speeds, to me, would indicate a blockage in the head. T-stat opens @ higher RPMs to allow ‘full flow’, but sounds like your flow may be impeded. </p><p></p><p>Trace pee port line from cowling back to block. Carefully remove line. Any crud at the nipple there? Once had a 6hp with head blockage from salt build up that I took off powerhead (much easier to do on a 6 vs a 40) turned head upside-down and filled w/ vinegar for 3-days. Emptied head by compressed air, then reassembled and it ran like a charm.</p></blockquote><p></p>
[QUOTE="DaleH, post: 456464, member: 15636"] Over-temp at higher speeds, to me, would indicate a blockage in the head. T-stat opens @ higher RPMs to allow ‘full flow’, but sounds like your flow may be impeded. Trace pee port line from cowling back to block. Carefully remove line. Any crud at the nipple there? Once had a 6hp with head blockage from salt build up that I took off powerhead (much easier to do on a 6 vs a 40) turned head upside-down and filled w/ vinegar for 3-days. Emptied head by compressed air, then reassembled and it ran like a charm. [/QUOTE]
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