Go Back   DIY Go Kart Forum > Building Plans And Advice > Engines & Clutches

Notices

Closed Thread
 
Thread Tools Display Modes
  #1  
Old 06-19-2011, 10:31 AM
Thrahl Thrahl is offline
Junior Member
 
Join Date: Jun 2011
Posts: 7
Thanks: 4
Thanked 0 Times in 0 Posts
Default Multiple Problems with Torque Converter

I have a modified Manco Dingo that originally came with a 8 or 10hp engine and a Comet 40 series TC.
The engine was trash so it now has a 5.5hp Honda GX200 clone.
But the new engine has a 3/4 shaft rather than 1" so we went a got a 20 series drive clutch for it, but kept the 40 series driven.

It runs good for a bit but the belt gets stretched out within a few rides and is basically unusable after about 20 hours of use.
The engine is not adjustable relative to the jackshaft so I can't move it back to tighten the belt.
Belts are like $30-40 a pop so I can't afford to just keep putting new belts on.
The belt doesn't look worn at all and has no cracks or frays or anything, it's just stretched.

Is the problem because of my mismatched TC or something else? And what can I do to fix it? (short of buying an $80 20 series driven)
  #2  
Old 06-19-2011, 11:57 AM
B man's Avatar
B man B man is offline
Tecumseh FTW!
 
Join Date: Jan 2011
Location: Oliver springs,Tn
Posts: 2,491
Thanks: 32
Thanked 98 Times in 93 Posts
Default

get the correct driven for your driver.
__________________
If it doesn't work......well then its gonna!
  #3  
Old 06-19-2011, 04:34 PM
redsox985's Avatar
redsox985 redsox985 is offline
Senior Member
 
Join Date: Mar 2010
Location: PA
Posts: 4,095
Thanks: 57
Thanked 204 Times in 183 Posts
Default

The 20 series driver uses a 3/4" belt and the 40 a 7/8" belt. Make sure the belt is made for the specific center distance between the driver and driven also. Selling the 40 series TC will easily pay for a 20 series one, but I doubt you'll be happy with 5.5 HP when you used to have 10, in which case, you need the 40 again.
The Following User Says Thank You to redsox985 For This Useful Post:
Thrahl (06-20-2011)
  #4  
Old 06-19-2011, 06:12 PM
kendelrk's Avatar
kendelrk kendelrk is offline
redneck engineer
 
Join Date: Feb 2011
Location: westland michigan
Posts: 2,427
Thanks: 24
Thanked 84 Times in 84 Posts
Default

5.5 hp is a gx 160 clone isint it? i thought 6.5 was gx 200 clone
  #5  
Old 06-19-2011, 06:18 PM
Doc Sprocket's Avatar
Doc Sprocket Doc Sprocket is offline
Moderator
 
Join Date: Jun 2009
Location: Ontario, Canada
Posts: 15,489
Thanks: 675
Thanked 2,056 Times in 1,634 Posts
Default

Correct- Gx160=5.5hp, gx200=6.5hp.
And yes, you need to have matching driver and driven, and the correct pulley center distance.

If you're handy, resourceful, or lucky- you can buy/find/fabricate an adapter bushing to alow you to use the 40 driver on the new engine.
__________________
Treat it as you would an aircraft frame and you should have no problems. -Name Withheld
The Manual- "Just the manufacturer's opinion of how to put this together."- Tim "The Tool Man" Taylor
Put down the wrench, and come out with your hands up!- Me!
Wrench, Wheel, Wreck, Repeat...
The Following User Says Thank You to Doc Sprocket For This Useful Post:
Thrahl (06-20-2011)
  #6  
Old 06-19-2011, 07:51 PM
Thrahl Thrahl is offline
Junior Member
 
Join Date: Jun 2011
Posts: 7
Thanks: 4
Thanked 0 Times in 0 Posts
Default

Sorry it took so long to get back I have been busy.

@redsox985 - I have been running it with the 5.5 ever since I got it. The 10hp it came with was nonfunctional (don't know what was wrong with it, was before I cared about this stuff). So I don't know what I'm missing :P

@kendelrk - I thought so at first but I wasn't sure so I went on the Honda site and saw 4.8 http://engines.honda.com/models/model-detail/gx160. Maybe I am looking at the wrong stat.

@ toystory 4wd - when you say adapter, do you mean 3/4" to 1" adapter for the shaft? I have thought about that but I thought that since the 40 series says it is for 8-18hp it might pose a problem for my 5.5? (though I doubt it would be as bad as my current problem lol)
  #7  
Old 06-20-2011, 03:42 AM
Doc Sprocket's Avatar
Doc Sprocket Doc Sprocket is offline
Moderator
 
Join Date: Jun 2009
Location: Ontario, Canada
Posts: 15,489
Thanks: 675
Thanked 2,056 Times in 1,634 Posts
Default

Yep- that's exactly what I mean. I'm going to be doing that, too. There's a very good possibility it will work just fine. They do suggest a minimum of 8hp- probably because you just don't tend to see engines smaller than 8hp with a 1" shaft.

EDIT- did you dispose of the 10hp?
Here, check this thread- http://www.diygokarts.com/vb/showthread.php?t=9990
__________________
Treat it as you would an aircraft frame and you should have no problems. -Name Withheld
The Manual- "Just the manufacturer's opinion of how to put this together."- Tim "The Tool Man" Taylor
Put down the wrench, and come out with your hands up!- Me!
Wrench, Wheel, Wreck, Repeat...
The Following User Says Thank You to Doc Sprocket For This Useful Post:
Thrahl (06-20-2011)
  #8  
Old 06-20-2011, 09:33 AM
Thrahl Thrahl is offline
Junior Member
 
Join Date: Jun 2011
Posts: 7
Thanks: 4
Thanked 0 Times in 0 Posts
Default

@toystory 4wd - I did a lot of researching last night and figured out what I am going to have to do. Adapting a 40 series on to a 3/4" shaft seems like a somewhat common problem with a fairly easy fix.

Unfortunately yes I did throw the 10hp away. I built the go kart with my father years ago and at the time I didn't know anything about engines. Looking back I should have kept it and I could have possibly got it running again. Oh well though.

And yes I read that thread last night and it was very helpful.

I think I pretty much have all the info I need to give this a shot. Thanks for all of your help guys.
  #9  
Old 06-20-2011, 05:18 PM
Doc Sprocket's Avatar
Doc Sprocket Doc Sprocket is offline
Moderator
 
Join Date: Jun 2009
Location: Ontario, Canada
Posts: 15,489
Thanks: 675
Thanked 2,056 Times in 1,634 Posts
Default

You're welcome. Good luck.
__________________
Treat it as you would an aircraft frame and you should have no problems. -Name Withheld
The Manual- "Just the manufacturer's opinion of how to put this together."- Tim "The Tool Man" Taylor
Put down the wrench, and come out with your hands up!- Me!
Wrench, Wheel, Wreck, Repeat...
Closed Thread

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 09:57 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.