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General Jet Boat Discussions
Jet outboard hot rodding/stainless impeller questions
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<blockquote data-quote="Lil&#039; Blue Rude" data-source="post: 316088" data-attributes="member: 4627"><p>Here's my experience with them. Disclaimer "My motors AREN"T stock" :mrgreen: . 40/28 omc and 60/40 omc on 16' 42" Blazer SS. Light boat.</p><p> I started out with a aluinium 3 blade in the 40/28. was getting between 37-38 on the lake. switched over to a 3 blade polished stainless and gained 1 solid mph up to 39. Same thing on the 60/40 gained solid mph and that was from a sharpenend on polished aluminium to a sharpenend non polished stainless. Both three blades.</p><p>I have run a 4 blade stainless in the 40/28 before. Couldn' tell any diffrnece on bottom end and it hurt my top end. didn't sound like it cut my rpms any just only pulled 36mph across the lake.</p><p>Flywheel just gonna help out of the hole. reeds will help all aroud. Check out Chris Carson reeds. Great guy to deal with. Very helpful. Not sure about the ecu but I've heard Simons is good to work with.</p><p>You can polish the pump. get some thinner grates and bevel the leading edge. Cean up the shoe so that everything is smooth and even. You can cut the liner so the edge of the liner meets the edge of the impeller blades.</p><p>I sharpen on the top side of the impeller. this brings the leading edge down making the motor hook up better. About like adding a little more pitch to the leading edge. If your motors gotta a 4 blade I don't recomend sharpening this way because it may bite enough that it hurts holeshot if the motor don't have enough umph to pull it.</p></blockquote><p></p>
[QUOTE="Lil' Blue Rude, post: 316088, member: 4627"] Here's my experience with them. Disclaimer "My motors AREN"T stock" :mrgreen: . 40/28 omc and 60/40 omc on 16' 42" Blazer SS. Light boat. I started out with a aluinium 3 blade in the 40/28. was getting between 37-38 on the lake. switched over to a 3 blade polished stainless and gained 1 solid mph up to 39. Same thing on the 60/40 gained solid mph and that was from a sharpenend on polished aluminium to a sharpenend non polished stainless. Both three blades. I have run a 4 blade stainless in the 40/28 before. Couldn' tell any diffrnece on bottom end and it hurt my top end. didn't sound like it cut my rpms any just only pulled 36mph across the lake. Flywheel just gonna help out of the hole. reeds will help all aroud. Check out Chris Carson reeds. Great guy to deal with. Very helpful. Not sure about the ecu but I've heard Simons is good to work with. You can polish the pump. get some thinner grates and bevel the leading edge. Cean up the shoe so that everything is smooth and even. You can cut the liner so the edge of the liner meets the edge of the impeller blades. I sharpen on the top side of the impeller. this brings the leading edge down making the motor hook up better. About like adding a little more pitch to the leading edge. If your motors gotta a 4 blade I don't recomend sharpening this way because it may bite enough that it hurts holeshot if the motor don't have enough umph to pull it. [/QUOTE]
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