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Jet Boats
General Jet Boat Discussions
Outboard jet tunnel design questions
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<blockquote data-quote="JL8Jeff" data-source="post: 422575" data-attributes="member: 12995"><p>I have a Roughneck 1652 tunnel with a Merc 60/45 jet. I had to use the transom wedges and have the motor mounted with the front of the foot just below the tunnel extension. I moved my center console forward and put the battery up front as well and it planes off pretty quick. The only time I get cavitation is if there are a couple of people up front. My tunnel looks the same as yours so I don't think the tunnel is the issue. Where are you sitting when you get the cavitation? When my console and battery were farther back, it would take longer to plane off, but now it happens really quickly. I think mine is a shorter transom than yours, I have a short shaft jet but I don't know why that would matter. I just run on the river but it sounds odd you would have problems on the lake.</p><p></p><p>-</p></blockquote><p></p>
[QUOTE="JL8Jeff, post: 422575, member: 12995"] I have a Roughneck 1652 tunnel with a Merc 60/45 jet. I had to use the transom wedges and have the motor mounted with the front of the foot just below the tunnel extension. I moved my center console forward and put the battery up front as well and it planes off pretty quick. The only time I get cavitation is if there are a couple of people up front. My tunnel looks the same as yours so I don't think the tunnel is the issue. Where are you sitting when you get the cavitation? When my console and battery were farther back, it would take longer to plane off, but now it happens really quickly. I think mine is a shorter transom than yours, I have a short shaft jet but I don't know why that would matter. I just run on the river but it sounds odd you would have problems on the lake. - [/QUOTE]
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Outboard jet tunnel design questions
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