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Old 12-12-2017, 04:46 PM
Mechengr2k2 Mechengr2k2 is offline
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Default Torque converter question

I have a 6.5hp engine and 30 series torque converter that has trouble getting it moving - the engine revs but it doesnt accelerate. I can get it going by pushing it off and it will sometimes take off and run fine but when you stop it has trouble again.

New spring installed (in slot 2), all buttons are good, belt in visibly good condition and is the correct size according to charts I have seen.

Any ideas? Could the engine not be revving high enough to engage the drive belt? Even though the belt is the right one I feel like it is too loose...do they stretch?

Any help would be greatly appreciated!
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Old 12-12-2017, 04:55 PM
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What size tires? What kart is it? Pictures? What sprockets, front and rear teeth counts?

You've checked out the Driven Pulley.
Check out the one connected to the crankshaft. Take it apart and explore its innards. Pictures?
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Old 12-12-2017, 09:58 PM
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Place the rear of the kart on a jack stand (raising the rear wheels off the ground) & hit the throttle; what happens?
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Old 12-12-2017, 10:52 PM
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Sounds like gearing to me. Post what Bob asked for and we can help you out
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Old 12-13-2017, 05:19 PM
Mechengr2k2 Mechengr2k2 is offline
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I just figured it out. I removed the drive pulley and re-checked all measurements (center distance, pulley diameters, etc) which concluded I have the right belt, but there was way too much gap between the belt and the bronze bushing so I thought maybe the belt had stretched even though I really doubted it.

I had a new belt and when I got it out I immediately realized the new belt was a good 1/16" wider than the old belt. When I installed the new one it rode much higher in the driven pulley which took up the slack.

It runs like a champ now.

---------- Post added at 07:19 PM ---------- Previous post was at 07:18 PM ----------

I would post pics but I can't figure out how
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Old 12-13-2017, 09:41 PM
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It looks more complicated than it is.
You can't do it from the "Quick Reply" box under a post.
You need the Advanced features, which are not available in "Quick Reply".

click on "Post Reply" under a post,
or click on "Go Advanced" which is near the bottom of the Quick Reply box,
scroll down,
click "Manage Attachments",
click "Choose File"
Find the image saved to your PC,
click "Open"
repeat for multiple images,
click "Upload"
Click "Close This Window"
Click "Submit Reply"

Don't forget to add text or it will tell you your post is too short.
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