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#3085577 - 12/18/12 04:39 PM convert regular outboard to jet?
catman529
spiderboy
16 Point


Registered: 11/10/10
Posts: 17592
Loc: Franklin TN

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any redneck ways to convert your regular outboard to a jet? like adding a duct to the lower unit or something... my motor is air cooled too. Would make a good off season project if the outcome is actually practical... lol
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#3085604 - 12/18/12 04:58 PM Re: convert regular outboard to jet? [Re: catman529]
SilverFox
12 Point


Registered: 10/16/10
Posts: 5418
Loc: Kodak TN

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You can buy a jet foot for newer motors... It's 1/3 the rated HP at the foot. So a 30 HP prop converted to a jet is 20 HP at the jet.
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#3085621 - 12/18/12 05:12 PM Re: convert regular outboard to jet? [Re: SilverFox]
SES
8 Point


Registered: 10/13/11
Posts: 1313
Loc: Corryton, Tn

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It will set you back about $1800. Pretty simple from what I've heard. Take your lower unit off, bolt the jet pump on.
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#3085677 - 12/18/12 05:53 PM Re: convert regular outboard to jet? [Re: SES]
AllOutdoors
10 Point


Registered: 11/03/08
Posts: 3685
Loc: Tennessee

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Here you go.

http://www.outboardjets.com/index.php
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#3085681 - 12/18/12 05:57 PM Re: convert regular outboard to jet? [Re: AllOutdoors]
AllOutdoors
10 Point


Registered: 11/03/08
Posts: 3685
Loc: Tennessee

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You may need to raise your transom height too or add a jack plate. It will depend on how your transom is made and rather or not your motor has a short shaft.
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#3085685 - 12/18/12 06:01 PM Re: convert regular outboard to jet? [Re: AllOutdoors]
AllOutdoors
10 Point


Registered: 11/03/08
Posts: 3685
Loc: Tennessee

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Also I beleive the smallest pump will fit is a 20hp.
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#3086125 - 12/18/12 09:53 PM Re: convert regular outboard to jet? [Re: catman529]
CATCHDAWG
10 Point


Registered: 04/02/04
Posts: 3956
Loc: Bradley co. TN

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 Originally Posted By: catman529
any redneck ways to convert your regular outboard to a jet? like adding a duct to the lower unit or something... my motor is air cooled too. Would make a good off season project if the outcome is actually practical... lol

I used to have a setup very similar to yours, just carry extra shear pins and keep the motor unlocked so it can kick up if you hit something. It don't have enough weight and power to break anything if you drive it right. You might ding up the prop some but no biggie. I had a "river prop" and a "lake prop" just changed them out as seen fit. I'd love to convert my new boat to a jet but can't justify the cost until I break something, lol
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#3086168 - 12/18/12 10:44 PM Re: convert regular outboard to jet? [Re: CATCHDAWG]
catman529
spiderboy
16 Point


Registered: 11/10/10
Posts: 17592
Loc: Franklin TN

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 Originally Posted By: CATCHDAWG
 Originally Posted By: catman529
any redneck ways to convert your regular outboard to a jet? like adding a duct to the lower unit or something... my motor is air cooled too. Would make a good off season project if the outcome is actually practical... lol

I used to have a setup very similar to yours, just carry extra shear pins and keep the motor unlocked so it can kick up if you hit something. It don't have enough weight and power to break anything if you drive it right. You might ding up the prop some but no biggie. I had a "river prop" and a "lake prop" just changed them out as seen fit. I'd love to convert my new boat to a jet but can't justify the cost until I break something, lol
cool. My motor doesn't even lock, it will kick up if it hits anything. Just don't want to have the prop get too messed up. I've had trouble with it slipping at full throttle after running the boat a good while. Still haven't pinpointed the problem and the clutch has a pin so I don't know the exact cause but it doesn't happen often.

I may just raise the transom with some wood, so the motor doesn't ride so low. Right now I start to hit bottom in knee deep water b
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#3086480 - 12/19/12 08:10 AM Re: convert regular outboard to jet? [Re: catman529]
Urban_Hunter
8 Point


Registered: 10/15/12
Posts: 1717
Loc: TN

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The slipping sounds like a prop bushing gone out. They are designed to protect the prop shaft from being over torqued by the engine when the prop hits something. Once it starts slipping as you described it will gradually get worse and then one day (possibly tomorrow with no warning at all) it will just go out. Then you are stuck at idle speed only. I recommend pulling the prop and taking it to a place like "the prop shop" in Old Hickory, they will rebuild it for probably $30
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#3086542 - 12/19/12 08:53 AM Re: convert regular outboard to jet? [Re: Urban_Hunter]
catman529
spiderboy
16 Point


Registered: 11/10/10
Posts: 17592
Loc: Franklin TN

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I've checked the bushing and it looked in perfect condition and marked with paint in case it slipped again to see if the paint moved. Honestly i haven't taken it off and checked since then. It could be slipping but it didn't show any signs of wear. I think fishing line getting wrapped on the shaft (this has happened) might have something to do with it.
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#3086635 - 12/19/12 09:43 AM Re: convert regular outboard to jet? [Re: catman529]
scn
16 Point


Registered: 02/05/03
Posts: 10449
Loc: Brentwood, TN US

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Fishing line getting caught behind the prop is bad for cutting the seal to the lower unit and letting water get in there.

Before it gets too cold (if your motor is stored outside), you probably need to check the conditon of the lower unit lube. If it is "milky", you have a seal issue and need to replace the seal and put in new lube. If water gets into your lower unit and freezes, it can crack your lower unit and then you will have to replace the whole deal.
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#3086733 - 12/19/12 10:56 AM Re: convert regular outboard to jet? [Re: scn]
catman529
spiderboy
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Registered: 11/10/10
Posts: 17592
Loc: Franklin TN

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 Originally Posted By: scn
Fishing line getting caught behind the prop is bad for cutting the seal to the lower unit and letting water get in there.

Before it gets too cold (if your motor is stored outside), you probably need to check the conditon of the lower unit lube. If it is "milky", you have a seal issue and need to replace the seal and put in new lube. If water gets into your lower unit and freezes, it can crack your lower unit and then you will have to replace the whole deal.
thanks for the advice. I had known of that but haven't checked the lube yet. Going to put fresh oil in the lower unit anyway. Motor is in the garage so it should be safe.
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#3086760 - 12/19/12 11:23 AM Re: convert regular outboard to jet? [Re: catman529]
R Crabtree
4 Point


Registered: 12/05/05
Posts: 426
Loc: East TN

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I had a guy make a prop guard for a little 5hp jon boat motor. He used a pitch fork head. Pretty simple design and definitely keeps the prop off the bottom. If you are interested in going that route I could prolly get a picture up.
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#3086768 - 12/19/12 11:28 AM Re: convert regular outboard to jet? [Re: R Crabtree]
R Crabtree
4 Point


Registered: 12/05/05
Posts: 426
Loc: East TN

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A feller can find anything with google!

This is not mine but you get the idea....







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#3086959 - 12/19/12 01:43 PM Re: convert regular outboard to jet? [Re: catman529]
Urban_Hunter
8 Point


Registered: 10/15/12
Posts: 1717
Loc: TN

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Not trying to argue, but I've only seen one bushing that I could see was damaged by looking at it. If you painted it, you have to paint a part of the output shaft and a part of the prop, as the bushing may be spun on the prop side or the shaft side. If it is slipping, it can only be the bushing... unless you are going fast enough to get air under the boat. If your engine has good compression, you can SOMETIMES tell by turning the prop by hand (ignition off) while in gear. Try it both directions. The engine should turn with the prop (watch the flywheel). This really only works on 4cyl and bigger engines.

Note... 4 cylinder.... not 4 stroke
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#3087002 - 12/19/12 02:00 PM Re: convert regular outboard to jet? [Re: Urban_Hunter]
catman529
spiderboy
16 Point


Registered: 11/10/10
Posts: 17592
Loc: Franklin TN

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I forgot about the pitchfork! A TWRA guy at Williamsport told me about that trick.

Urban hunter - my motor is only a 5 horse and I can easily turn the engine by hand with the prop in gear. Ill check the paint mark that I made.
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#3088081 - 12/20/12 07:31 AM Re: convert regular outboard to jet? [Re: catman529]
Urban_Hunter
8 Point


Registered: 10/15/12
Posts: 1717
Loc: TN

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5 horse briggs? Great little motors.
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#3088344 - 12/20/12 10:05 AM Re: convert regular outboard to jet? [Re: Urban_Hunter]
catman529
spiderboy
16 Point


Registered: 11/10/10
Posts: 17592
Loc: Franklin TN

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yep it's a 5 horse briggs
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#3088624 - 12/20/12 01:48 PM Re: convert regular outboard to jet? [Re: catman529]
CATCHDAWG
10 Point


Registered: 04/02/04
Posts: 3956
Loc: Bradley co. TN

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 Originally Posted By: catman529
yep it's a 5 horse briggs

Why did they quit making that motor? I've never heard anything bad about them. I was in a boat last summer with a 9.9 Johnson and his buddy had the little Briggs on his and our boat couldn't keep up!
Coleman is making one now that might be the same thing with a different name but I'm not sure.
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