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PostPosted: January 26, 2018, 5:56 pm 
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Joined: January 13, 2008, 9:07 pm
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Location: Glendale AZ
Looking for a starter ring gear that is 4" to 5" max diameter for a electric revers system. Could be from a electric start ATV,UTV,motorcycle,lawn tractor,or ant thing. Any ideas where to look ?
Thanks, Randy

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PostPosted: January 26, 2018, 8:02 pm 
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Joined: December 29, 2007, 10:41 pm
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Location: Vancouver, BC
Randy,

Martin (mgkluft) used a Ski Doo part:

http://www.locostusa.com/forums/viewtopic.php?f=35&t=14520&start=90


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PostPosted: January 26, 2018, 8:15 pm 
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Thanks, I read that. Wonder what the OD was ?

I maybe looking for a gear that is too small ? 5" or less ?

Trying to get back on the Lotus 11/15 project.

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PostPosted: January 26, 2018, 8:59 pm 
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B85, Try going to a small engine repair shop and see what they've got available in their scrap heap from a Briggs and Stratton or Tecumseh engine that was electric start. You could probably get the matching starter/drive gear for next to nothing too.

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PostPosted: January 26, 2018, 9:24 pm 
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Going to try that Saturday,good idea.

Was also think UTV,jet ski and the like ?

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PostPosted: January 26, 2018, 9:40 pm 
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I've spent some time looking into this and the starter motors and ring gears for some small tractors (John Deere, Cub Cadet, etc.) look promising. I think they may be a bit larger in diameter than what you're looking for however.

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PostPosted: January 26, 2018, 9:43 pm 
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Found the guy's in the UK, (lynx) now just need to get a reply ?

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PostPosted: January 27, 2018, 12:00 am 
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Thanks, Rod.
The diameter is about 7 1/4" and it was off a 1976 Skidoo. A purely lucky find off Ebay.
Randy,
I think one of the things to consider is the relationship between the Bendix and the ring gear. Once I found the gear, which was only about $ 40, I did some cross checking, and I found out that the Skidoo Bendix was nearly identical to the SBC starter motor that I found. I can give you some more exact specs if you need them.
From a a practical experience, I think that you will find a small engine gear and starter motor to be under powered. My gear is 7 1/4" in diameter and the starter motor is rated at 3.5 hp, and it takes that much to move the car.
https://www.youtube.com/watch?v=TdObULcKL94&t=3s

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My build log:
viewtopic.php?f=35&t=14520&start=0
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PostPosted: January 27, 2018, 1:15 am 
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Location: Glendale AZ
Martin, your famous I say you on YouTube.

Any all all info would help.PM or post is good. I have been looking at your build and think I can make it fit ? The 7 1/4 is going to be the hard part. Hope I can get something from the guys in the UK but we will see ?

Is you starter a gear reduction ? Also have been thinking about some kind of soft start system ? Here is the space I'm working with.

Image

And thanks for the help and imput.

Randy

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PostPosted: January 27, 2018, 1:56 pm 
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Randy,
this is the starter that I used; it is 3 hp not 3.5, so no burgers for lunch, before backing up.
https://www.ebay.ca/itm/SBC-BBC-CHEVY-3 ... dF&vxp=mtr
The bendix gear is 1.165" OD, and 9 teeth.
Here is a good candidate for a ring gear. Don't know the diameter, but it looks about right. Check with the vendor. The center can be machined off, and a mounting plate made to be sandwiched between the flange and the u-joint.
https://www.ebay.ca/itm/Yamaha-Snowmobi ... Ui&vxp=mtr
I had thought about a soft start, but couldn't find something suitable. Don't know if that would make it more user friendly; it is not the most elegant drive system to begin with, however, it works just fine as it is. My daughters would rather that I don't back up; it sounds too embarrassing, Dad :BH:
I find, that with the roll cage, it is just as easy to push the car back. I only use the reverse when I'm already strapped in or in an emergency.

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My build log:
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PostPosted: January 28, 2018, 12:13 am 
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Thanks.

Found a 5 1/2" gear out of the R1 and will see if I can use it ?

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