Cheap Chinese TC? / A lesson in rushing purchases.

[Whitetrashrocker]

Pics squiddy.
Come on now. ...

 

[Sparkwizard]

The gear ratio is not as extremely low speed as it was before. You will need to get some speed before the belt shifts.
You should not be looking back at the belt at wide open throttle.

 

[Squiddy202]

The gear ratio is not as extremely low speed as it was before. You will need to get some speed before the belt shifts.
You should not be looking back at the belt at wide open throttle.

No I was looking at it at the max speed I was getting. No matter what I know my shaft spins counterclockwise.

 

[Thepartsguy]

The Murray explorer in question has some big tires on the back. And I‘m not exactly understanding the output spins backwards? Is the kart trying to drive in reverse?

 

[Squiddy202]

The Murray explorer in question has some big tires on the back. And I‘m not exactly understanding the output spins backwards? Is the kart trying to drive in reverse?

Crap when people say a CCW engine do they mean it spins counterclockwise looking at the flywheel or the output? I may have misdiagnosed my issue.
WTR I don’t know how much good pics will do.
I realized I am an idiot. It was working on the Jack. Not while driving.. How would do fix that, and how do I reassemble a driven pulley as my tutorial sucks? I probably still needed to do all the work to take it apart to adjust the spring so this could suck worse. Do I need a new spring or is adjusting hole position enough?

 

[Whitetrashrocker]

From that view in the pic everything will turn counterclockwise. All engines spin that way.

As the engine spins faster the drive unit will close and the belt will ride up.
This in turn will pull the belt deeper into the driven unit. The spring is trying to resist this. This is normal operation.

When you run it on the jackstands you should easily observe this.

It looks like your belt is loose. Too long for this application.
The drive closes, belt should ride up. But too long of a belt will not spread the driven the way it's supposed to.
Did you measure the center to center and order the correct belt?

The cvt should operate out of the box. The springs are for tuning purposes.

Is your throttle opening all the way. If not you might not be getting full power out of the engine.

 

[Thepartsguy]

From that view in the pic everything will turn counterclockwise. All engines spin that way.

As the engine spins faster the drive unit will close and the belt will ride up.
This in turn will pull the belt deeper into the driven unit. The spring is trying to resist this. This is normal operation.

I’m not the sharpest tool in the shed

From the one picture I just scrolled past Sparkwizard is correct the belt is way to long I’m guessing under load it’s not only slipping on the driver but also not opening the driven.

He is making progress and I looked back is that a 12t sprocket on the jackshaft? A 10t might be a bit better with the bigger tires on the back.

I cannot help you with the reverse spring in the driver or driven as I never messed with any of that.

 

[Squiddy202]

From that view in the pic everything will turn counterclockwise. All engines spin that way.

As the engine spins faster the drive unit will close and the belt will ride up.
This in turn will pull the belt deeper into the driven unit. The spring is trying to resist this. This is normal operation.

When you run it on the jackstands you should easily observe this.

It looks like your belt is loose. Too long for this application.
The drive closes, belt should ride up. But too long of a belt will not spread the driven the way it's supposed to.
Did you measure the center to center and order the correct belt?

The cvt should operate out of the box. The springs are for tuning purposes.

Is your throttle opening all the way. If not you might not be getting full power out of the engine.

Basically I am an idiot… I saw the CVT movement on the jack. I didn’t see any movement while moving. The reason it looks lose is because the driven pulley is disassembled from me attempting to make an original fix. It doesn’t adjust ratio with wheels on the ground. Also how do I put a driven pulley back together? My tutorial kinda sucked.

Edit: I read the chart wrong, but my engine mounts can slide more than I originally did so I am gonna loosen the bolts and move it instead of buying a new belt. Also, this video that I found is much clearer for someone new to this:
Vid
I am just sending this for future readers with similar issues.

 

[Whitetrashrocker]

 

[Squiddy202]

Welp I got the driven reassembled. I still have the same issue. I even measured and I am right between 9-13/16 and 9-7/8 like the thing said. I took videos. I had to put them on drive to share. It should let Yall preview. One is on a jack an one isn’t. It just doesn’t change at all with me in it. Please help…

videos

 

[Sparkwizard]

Tire pressures? Engine RPM? Throttle working proprtly?

 

[Squiddy202]

Full PSI, no tach but should be about 3200 and I was using the lever throttle on the jack. Last I checked it gets maxed out by the pedal.

 

[Thepartsguy]

Ok so I’m still confused you are able to ride it but it’s slower with the torque converter and has worse acceleration?

If that’s the case I would also ask like Sparkwizard did how the engine revs out. Before the engine only had to throw the clutch weights out for the driver pulley clutch setup. Now there is a much bigger weight that pushes out a pulley that forces a belt to extend the driven.

Asking the engine to do a lot more work maybe the governor could use a slight adjustment? Or running a bit lean now under a higher load?

 

[Squiddy202]

Ok so I’m still confused you are able to ride it but it’s slower with the torque converter and has worse acceleration?

If that’s the case I would also ask like Sparkwizard did how the engine revs out. Before the engine only had to throw the clutch weights out for the driver pulley clutch setup. Now there is a much bigger weight that pushes out a pulley that forces a belt to extend the driven.

Asking the engine to do a lot more work maybe the governor could use a slight adjustment? Or running a bit lean now under a higher load?

Governor adjustment seems quite hard, I would much rather give it some more juice. I mean there is the audio on the videos, but I don’t have a tach. It sounded pretty maxed compared to when it had a CC. Also, how do I tune the AFR? I can find the screw but like I don’t want to just rotate, there has to be a method to the madness right?

 

[Thepartsguy]

Governor adjustment seems quite hard, I would much rather give it some more juice. I mean there is the audio on the videos, but I don’t have a tach. It sounded pretty maxed compared to when it had a CC. Also, how do I tune the AFR? I can find the screw but like I don’t want to just rotate, there has to be a method to the madness right?

Sadly my phone just doesn’t display the videos.. The carburetor should have two screws to adjust. One for the idle and one for the mixture. There are fixed jet non adjustable carburetors. Those carburetors only have an idle adjustment.

Don‘t mess with any of that yet. BUT so you have an idea of how it would work you tighten the mixture screw to close off the port and completely block off fuel flow. You loosen the mixture screw about 1 1/2 turns and that’s a base setting. It might be 2 1/2 turns out.. Wherever it seems to not hesitate when it revs up UNDER LOAD.

I only suspect a Governor because when I built my 8hp Briggs kart I got it all together and the 3200rpm limit struggled to get me out of the driveway. With the governor removed entirely it would max just under 50mph

 

[Squiddy202]

Sadly my phone just doesn’t display the videos.. The carburetor should have two screws to adjust. One for the idle and one for the mixture. There are fixed jet non adjustable carburetors. Those carburetors only have an idle adjustment.

Don‘t mess with any of that yet. BUT so you have an idea of how it would work you tighten the mixture screw to close off the port and completely block off fuel flow. You loosen the mixture screw about 1 1/2 turns and that’s a base setting. It might be 2 1/2 turns out.. Wherever it seems to not hesitate when it revs up UNDER LOAD.

I only suspect a Governor because when I built my 8hp Briggs kart I got it all together and the 3200rpm limit struggled to get me out of the driveway. With the governor removed entirely it would max just under 50mph

View attachment 160447

Doesn’t a governor delete cause it to potentially go past limits and leave more room for failure? They are there to prevent overrevving. If I shouldn’t change fuel mixture then what do I do? I really want to get this running.

Edit: it ran much faster and with more accel on a CC. Doesn’t that somewhat rule out the engine being underpowered? Do I just need more rpms?

 

[Sparkwizard]

You have installed a different drive system. It now senses load and adjusts the ratio based on engine RPM and rolling resistance.
Try driving it down a slight incline. If it worked with no load, it should work on the road, too. They never shift the belt as fast on the ground as they do on a stand. You should not feel it shift. Make sure your belt is not loose. The belt drive system will put some drag on the engine and effectively limit RPM as the belt shifts.
On the hand lever you were pulling, are there a bunch of small holes drilled in a line, with a spring in one of the holes? Moving that spring to another hole farther from the governor shaft will allow a little more RPM.

 

[Squiddy202]

You have installed a different drive system. It now senses load and adjusts the ratio based on engine RPM and rolling resistance.
Try driving it down a slight incline. If it worked with no load, it should work on the road, too. They never shift the belt as fast on the ground as they do on a stand. You should not feel it shift. Make sure your belt is not loose. The belt drive system will put some drag on the engine and effectively limit RPM as the belt shifts.
On the hand lever you were pulling, are there a bunch of small holes drilled in a line, with a spring in one of the holes? Moving that spring to another hole farther from the governor shaft will allow a little more RPM.

I was at top speed looking at it, no change and there was a slight downhill.

 

[Sparkwizard]

When you were riding it, and looked back...was the belt still down inside the driver pulley, or was it out near the outside of the pulley?

 

[Squiddy202]

When you were riding it, and looked back...was the belt still down inside the driver pulley, or was it out near the outside of the pulley?

Inside:

That was about all the further it got. That was also downhill.