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<blockquote data-quote="FuzzyGrub" data-source="post: 511555" data-attributes="member: 3438">That sounds more like a prop tunnel, wider and deeper than typical jet tunnel.&nbsp; Don&#039;t know if there is much impact to performance.&nbsp; Maybe a benefit to have the motor higher such that the heal is not below the bottom?&nbsp; If your river running doesn&#039;t require the shallowest possible, maybe a raised prop motor would be better?&nbsp; With cav plate at the top of the tunnel, or possibly a little higher,&nbsp; A prop would be much more efficient than the jet, power and gas usage wise.&nbsp;&nbsp; I have never been in or seen a prop tunnel boat, so would want to ask around on that to get more details.&nbsp; I assume the boat builder is no longer in business to get info from.&nbsp; Given no boat specs, might have to take to a weigh station to try to get a real weight.&nbsp; If you do go &quot;big&quot; on the jet, I&#039;d still add some good corner/transom bracing with the transom rebuild.</blockquote>

[QUOTE="FuzzyGrub, post: 511555, member: 3438"] That sounds more like a prop tunnel, wider and deeper than typical jet tunnel. Don't know if there is much impact to performance. Maybe a benefit to have the motor higher such that the heal is not below the bottom? If your river running doesn't require the shallowest possible, maybe a raised prop motor would be better? With cav plate at the top of the tunnel, or possibly a little higher, A prop would be much more efficient than the jet, power and gas usage wise. I have never been in or seen a prop tunnel boat, so would want to ask around on that to get more details. I assume the boat builder is no longer in business to get info from. Given no boat specs, might have to take to a weigh station to try to get a real weight. If you do go "big" on the jet, I'd still add some good corner/transom bracing with the transom rebuild. [/QUOTE]

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