Weed eater engine conversion

Check this out I just found, small UV joints. http://www.curtisuniversal.com/joints-alloy-single-bored.html

 

Sell the Rickshaw

it isn't worth a darn. I'll even be kind enough to take it off your hands just so you don't lose your shirt on the deal. That's the kind of guy I am.

How do you like the Rickshaw. I ahve heard mixed reviews. I hope Ed L makes it to the Midwest Duckboats.net gathering this year with his Rickshaw motor and we can compare to my homebuilt Duropower unit. I'm certain he would out perform me but ti would make an intersting comparison.

Mark

 

U-joints

I have been a lurker on this thread (the most comprehensive) and on other forums regarding "trimmer" mud motors. I wish to comment on CHRSEGU's u-joint post. I found this page very interesting on the site he linked.
http://www.curtisuniversal.com/custom-designs.html
It appears they do custom bores, including spline bores. One of the previous posts also recommended the scooter transmission - it had a splined output shaft. Just a thought

 

One thing to note, the universal you linked to is a pin & block style meaning there is no bearing in the equation. It's breaking strength is rated in inch pounds. That style cannot handle high speed or high torque applications. Take a lesson from jdbuckshot, you WILL burn up a pin & block style universal in very short order. Get the high torque needle bearing style.

 

They do have needle style bearings. I talked to them on the phone.

 

I have nothing to compare it to. It seems to run well on the Marsh Rat boat. Thinking of building a 50cc two stroke with gearbox to compare it to. Going to use same Rick Shaw 3 blade prop.

 

this is the start of my long tail project...your comment wanted.
I have a 6.5hp electric start honda copy and have fitted it with a Kart clutch by boring it out to 20mm ( shaft size) it engages at 2000 rpm. I hope to pass the drive downwards via a chain at 2.11 ratio to a long tail which will run under the motor to a prop. this will mean a right hand prop can be used which are easier to get hold of in australia....

all this started when I bought a jetski without any drive for $120 ..glassed up the bottom ,fitted an outboard mount (15 in) and fitted the 5 HP Briggs and Stratton outboard moving the seat forwards to give more room and re balance. I had intended to fit the 6.5hp inside the hull and use a coventional propeller but not happy about the prop hitting obstructions on the local everglades and shallow lake..so thought I would build the long tail for use on the Notski and the canoe ( 5m and wide )

any advice welcome

 

What negitave thing have you heard about it?

 

I think you mis understood him. He was joking and saying he will take it off your hands cause it's no good.

I'm curious though...John Oneil made a geared down 52cc moter but never gave a finished report. How did it do. I think the gears shouldn't be necessary in the larger unit but I dont peak from experiance.

 

Man pisstnbroke that looks like a scary ride. I'm thinking of the crocs out there where you live. I'd be like trolling yourself as bait..lol

Joking aside I think the longtail will work but it will be tough to navigate with such a short boat. Stability might be an issue as well since youll be leaning alot to turn the longtail. just my opinion though.

 

2 instances

I know of two people who have bought them and had problems. One had multiple problems and I know that Rickshaw was fixing them up to where he had a bad engine. I don't know if Rickshaw replaced the motor. I do know that Rickshaw was great to work with when fixing the issues. I think I heard exceptional support by John.

The other had similar problems in that the unit was damaged in shipping nad needed parts to fix. Once again, exceptional support

Also heard the clutch is a little weak compared to what you can get through moter scooter places.

I'll still take the unit off your hands though as it looks to be a nice rig for sure. Rickshaw has the right idea for a motor we are all looking for.

Mark

 

It does run well no complants. He will be coming out with a Honda GXH50 motor later this summer.

 

Pistnbroke,I like what your doing. A company builds one with the engine shaft forward like yours but they use v-belts and no clutch, if I remember right. I think I like your idea better with the clutch and chain. You do not intend to use a U-joint do you? If not, that is one less part,less maintenance and less potential for vibration. My only thought on no U-joint is; at what angle your engine can be safely operated without causing oil starvation. Does 15 to 20 degrees sound right for normal operation of a longtail ?? If so, probably not a problem, especially if the slapper is on prop side or engine has an oil pump. Just my thoughts. Looking forward to following your progress, keep us posted.

 

No universal joint as not required...the clutch I have ( American) has 12 tooth chain sprocket and I perfer chain as no permanent side load.Have tested engine at 15-20 deg and seems ok ..as oil filler on high side on unit will fill to overflowing with light oil and dont think it will be a problem...
Still trying to find out about balance on these things ..slightly tail heavy I guess...

 

Tail heavy with an adjustable stop. There are several good ideas in this thread for an adjustable stop to use when boat load changes or when used on a different boat.