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<blockquote data-quote="FuzzyGrub" data-source="post: 504509" data-attributes="member: 3438">FWIW: I looked in the 2022 Yamaha 75/90 manual.&nbsp; Even though it is a jet, you get the prop operators manual.&nbsp; I could not find any specific info that said to put in-gear or neutral for trailering.&nbsp; Only mentions to traailer in th full down position or using a support device if it has to be tilted.&nbsp; The Merc manual is at camp, so couldn&#039;t find out if there were any additional details that might give a clue why.&nbsp;&nbsp; I&#039;m not bought in to the road heat and seal failure theory.&nbsp; It is only the propeller shaft that is turning with the prop, and for the props I&#039;ve seen spinning at highway speeds are very low rpms.&nbsp; The black lower unit will be much hotter just sitting on the trailer and exposed to the sun, with no cooling wind.&nbsp; But, maybe they have a warning for that, buried somewhere in the manual.</blockquote>

[QUOTE="FuzzyGrub, post: 504509, member: 3438"] FWIW: I looked in the 2022 Yamaha 75/90 manual. Even though it is a jet, you get the prop operators manual. I could not find any specific info that said to put in-gear or neutral for trailering. Only mentions to traailer in th full down position or using a support device if it has to be tilted. The Merc manual is at camp, so couldn't find out if there were any additional details that might give a clue why. I'm not bought in to the road heat and seal failure theory. It is only the propeller shaft that is turning with the prop, and for the props I've seen spinning at highway speeds are very low rpms. The black lower unit will be much hotter just sitting on the trailer and exposed to the sun, with no cooling wind. But, maybe they have a warning for that, buried somewhere in the manual. [/QUOTE]

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