GY6 157FM By robpatton (Read 5,437 times)

[robpatton]

It won't start.

I've had 13vac at the coil, and I've had 16vac at the coil. Still not start.

I've tried a 2nd plug.

I've added grounds, but I'm going to try again tonight to add an additional battery to motor/etc ground.

Funny thing, its in a buggy, but I thought it was a transplant from a scooter. How can you tell its from a buggy? I've never seen another buggy with the GY6, only scooters, and I can only find scooter stores.

Aug 11, 2011 4:28:07 GMT -6 Bashan said:

So the problem with this bike is it won't start or runs poorly? We're kind of all over the ballpark here. You've said you had 16v AC at the coil and then later 13. What is it currently putting out? 16 is normal, 13 is low. Your values on the white and yellow are low but that doesn't matter on the spark. If you're getting 16v AC at the coil and you tested that coil in another bike then I think your good up to the end of the plug cap. Have you tried another plug? If so, I'd have to go with a bad ground/loose connection somewhere down the pike. Have you located and checked the engine ground? Also, it sounds like your pretty good with a multimeter, start checking wires for continuity. That engine is made for a buggy, is it currently in a scooter? Just curious. Rich

[robpatton]

Since I tried to post that, I've had success. I pulled the wiring apart, and cleaned up a bunch of things. Sprayed with starting fluid and got a cough.

So that was good. Then turned out the fuel tank had some sort of vac controlled valve on the bottom that was iffy, and really kept the flow to low. Cleaned that.

Then it would run but not well, and not for more than 3 or 4 secs. Figgured carb was junked up.

Drained all gas, pulled carb, and readlized the choke unit was about to fall off. Since I had a NOS carb in the box, I went ahead and changed that out. and with some minor tuning, I'm throwing dirt.


Where was this motor when I was 12/13/14??!?!? Would have been better than my 3hp tech motor.

[Bashan]

Well that's fantastic, I'm proud you got it going. We all learned from your journey and I'm sure you won't forget the experience either. I leaned a lot researching that very odd engine number. Well, let us know if you have any more problems. Rich

[robpatton]

Yes, I'm quite happy. Less than a week ago I had no idea what a Gy6 motor was, nor did I realize all the different scooter options there were, and just how many inexpensive scooter options there are. Its been a fun learning trip. Thats to the forum for all the good hours of reading I've done, and just how fast one can get "up to speed" on working on these.

[Kaveman]

Glad you have learned from your expierence ! ;D
Will