Weed eater engine conversion

LSU I dont know what cc it would be. John Oniel would know best that was all his creation. If you cant get him on here you might try www.duckhuntingchat.com he gets on there alot..as well as rippedoff. I dont know what boat your mounting it to but my stealth goes through flooded veg ok. When you bottom out a bit its over. I think if your vessel is light it might push a little but I know my set up has no chance at all. It should handle current pretty good though. I take my rig catfishing and it does ok in current when the reservoire dams are flowing.

 

swamprunner, it took me 3 weeks to build then I spent a few months working the bugs out. I snapped a shaft by the end of summer and spent a week fixing it. The 1st time I machined the end of the shaft myself with a grinder. That wasted alot of time. When I snapped the shaft I took it in to a good machine shop and it made a huge difference. smoother and no vibration.

I spent alot cause I bought alot of tools. Mostly machining stuff like threaders. Anyway I spent exactly 336.72. I know that's kinda high but now I could make one for half that if I got the brushcutter for cheap. It starts adding up fast though.

 

LSUboy; I built my first mini-mud motor using a 25cc engine . It just didn`t provide enough power in direct drive mode. My next effort was with a hopped-up 31cc Ryobi engine. This motor made plenty of power from 5500 rpm up but without a gear reduction was only marginally better than my first effort. The third time was charm. I used a 52cc brush cutter. This unit will push my 13 ft. layout boat (loaded) to hull speed easily. It will handle some weeds but grounds out in the mud. An increase in the cc as you have proposed would no doubt help, but I seriously doubt if it will enable you to throw much mud.The last mini-mm that I built was a 52 cc gear reduction model that utilized a 5/1 scooter transmission. The reducer multiplied the torque enough to sling a little mud if necessary. I hope this background info. will help you decide which path to take. Good luck with your build.

 

Lsuboy; Here are some 52cc engine pics. The first couple are of the gear reduction model.




This is a brushcutter conversion. Easiest to build. Weighs only 20 lbs. Goes almost anywhere.



This is my buddy Mike at speed using the gear reduction unit on his homebuilt foam layout.

 

dear John O`Neal
how did u build the shaft for that one that was easy to build and could u send me the plan for it

 

john would you know were i could get a prop for the best performance and wat size i would need

 

Swamprunner23; Go back in his thread to pages 15 & 18 I think you will find the info your looking for. A brush cutter has almost all the parts you will need . Motor ,clutch, drive tube with bearings , drive shaft, handle mount . Just remove the cutter head install a bearing and seal at the prop end. Install the prop. Your almost done.

LSUboy 13 The prop shown on my brush cutter conversion is a Youngs T-12. (Young`s die cast aluminum prop`s) They make several in the 5 1/2" to 5 3/4" range, and they are cheap. (Rickshaw motors) also offers a couple of versions that should work . And there is always Ebay.

Good luck with your builds.

 

dear John O`Neal
thank for the info about the building it

 

John wat size prop do you have on the 52cc version and do u know were i could get one and does it bog the motor down

 

John does the prop on the brushcutter model give u a good performance or would u suggest a bigger or smaller. And about how fast does the 523cc model push your boat

 

LSUboy; The T-12 Young`s prop or corresponding size (5 1/2" -5 3/4") is about all the prop I feel a 52cc direct drive motor can handle. I was very pleased with the performance it provides. It will push my 13.6" X 50" layout to hull speed (approx.6 mph) easily.

 

Prop

Go back to page 15 of this thread and look at the pic of my 52cc mud motor. It pushed that boat 6.2 mph easily when loaded with just my fat bvutt in it. Going upstream fully loaded with all the duck hunting gear that will fit in it it did a similar speed. No gps with me on those trips but seat of the pants tels me it was close to 6.2.

I used the same prop from Young's prop.

 

jonh do u think i will need a big prop like on the 52cc if i have a gear reduction

 

Hey Lsuboy -

Using a gear reducer allows you to use a bigger prop due to the increased torgue and hp at lower rpms (at the prop)

What kind of gear reducer are you looking at? Curious minds.

Mark

 

Hi there I am also attempting the same project I found a watersnake prop which works anticlockwise rotation for 200 rands.