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Jet Boats
General Jet Boat Discussions
Just a question regarding Jets vs protected props
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<blockquote data-quote="dhoganjr" data-source="post: 371307" data-attributes="member: 12925"><p>As mentioned above, the rockhopper protected outboards are made to occasionally get into the shallows and protect the prop from damage by kicking the motor up at slow speeds when you hit something. Anything at moderate speed or above is still more than likely to cause damage to the lower unit. Properly built tunnel hulls can run shallow down to maybe 10-12", but you still run the risk of damage if you hit bottom. </p><p></p><p>A jet is built for shallow running at planing speeds down to 2-3" of water. You still need deeper water for starting out and stopping in but once on plane about an inch of the shoe is below the boats hull. A jet is more forgiving if you do hit. A tree or stump usually you just slide over it. In gravel bottom streams if you hit most of the time it will suck rocks up in the grate and you have to stop and clean them out. The shoe is made of cast aluminum so if you hit a good sized rock or boulder just under the surface at speed you run the risk of busting a chunk out of it. This can be fixed by an experienced welder or by buying a new one at about $400. So, while they are built for running shallow, they are still at risk for being damaged when you run the extreme shallow areas. I have ran jets for about 14 years and have busted 1, so while it can happen, it is a rare occurrence.</p><p></p><p>I spend about 90% of my boating time on the river, mostly clear gravel bottom streams here in the Ozarks and that is where jets shine. I still feel sorry for the prop guys cussing and churning mud in the channel as I swing wide and wave going by a few feet off the bank.</p><p></p><p>You can overcome the hp loss with a bigger outboard or by building up the engine, depending on what it is.</p></blockquote><p></p>
[QUOTE="dhoganjr, post: 371307, member: 12925"] As mentioned above, the rockhopper protected outboards are made to occasionally get into the shallows and protect the prop from damage by kicking the motor up at slow speeds when you hit something. Anything at moderate speed or above is still more than likely to cause damage to the lower unit. Properly built tunnel hulls can run shallow down to maybe 10-12", but you still run the risk of damage if you hit bottom. A jet is built for shallow running at planing speeds down to 2-3" of water. You still need deeper water for starting out and stopping in but once on plane about an inch of the shoe is below the boats hull. A jet is more forgiving if you do hit. A tree or stump usually you just slide over it. In gravel bottom streams if you hit most of the time it will suck rocks up in the grate and you have to stop and clean them out. The shoe is made of cast aluminum so if you hit a good sized rock or boulder just under the surface at speed you run the risk of busting a chunk out of it. This can be fixed by an experienced welder or by buying a new one at about $400. So, while they are built for running shallow, they are still at risk for being damaged when you run the extreme shallow areas. I have ran jets for about 14 years and have busted 1, so while it can happen, it is a rare occurrence. I spend about 90% of my boating time on the river, mostly clear gravel bottom streams here in the Ozarks and that is where jets shine. I still feel sorry for the prop guys cussing and churning mud in the channel as I swing wide and wave going by a few feet off the bank. You can overcome the hp loss with a bigger outboard or by building up the engine, depending on what it is. [/QUOTE]
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General Jet Boat Discussions
Just a question regarding Jets vs protected props
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