Tagged: Iame tag kart motor issues
May 9, 2015 at 6:26 pm #47910
Hi I’m new to the karting world and I got a 2007 Iame motor and a new digital key ignition system kit with the harness from Comet Kart. Now I had to rebuild the motor due to bad bearings. Also, before that everything started just fine. No issues with the ignition of anything. But now that I’ve put everything back I go to turn the motor over and it does turn over and it does suck in gas but it only sucks up gas for a short time then it comes back out of the carb. I have no idea what’s going on here because everything’s out together the same way it was before. And the spark plug looks like it’s not getting a big enough spark like it did before. It actually doesn’t spark but it still shocks you if you touch it. Any help would be great.May 9, 2015 at 8:20 pm #47912
If you’ve had the carb off, you may have reinstalled the gasket between the engine and carb incorrectly. There is a small hole in the engine block beneath the gasket and there is a corresponding hole in the gasket. Make sure the holes line up. You will also see the same hole in the carb. That passage port, or hole, is the pulse line for the fuel pump in the carb.
Also, check the ground wires.May 10, 2015 at 5:57 am #47919
Thank! I’ll check that out. I actually took apart the car yesterday to check and it didn’t look blocked but I never noticed the hole for the gas going in. Hopefully that’s the problem. If not then I’m still lost.May 10, 2015 at 6:35 am #47920
<p>So that did not work </p>May 10, 2015 at 7:42 am #47922
<p>Fuel is being sucked up only through the carb and back out of the front of it. Not even making it into the motor and I checked all the holes and everything and it’s all lined up. Did I put the motor together wrong? Maybe I didn’t torque the bolts to spec? </p>May 10, 2015 at 8:27 am #47925
Lets start with a little background. When you got the motor, did it have a key start or was that something you added? Did you do the engine work or was it done by a kart shop? I’ll assume that you have the Leopard Overhaul manual plus the Assembly Instructions and User Manual.
Check the needle valves in the carb are properly set and that the butterfly is completely closed.
If you serviced the card, here is a link to a video to compare with what you have done. https://www.youtube.com/watch?v=QpkK2v3jI74.
It’s not uncommon to have an ignition failure on a Leopard. As a new comer, it might be wise to have a kart shop diagnose and repair your engine. Could also be cheaper going that route and will be less frustrating.May 10, 2015 at 9:00 am #47926
<p>I checked my carb again and it’s all together right it looks. It’s still not sucking gas into the motor. I’m honestly stumped. My last resort would be to take it to my local track and get one of there mechanics to mess with it.</p>May 10, 2015 at 9:35 am #47928
When I push the throttle should anything move in the carb up or down? Because nothing happens. I’m just taking guesses now.May 10, 2015 at 11:29 am #47931
I’m still assuming that you have a Leopard engine. If so, nothing is going to up and down in the carb. A slide type carb, which you should not have on this motor does have a plate the moves up with depressing the gas pedal. Your carb has a round plate in it that rotates on a shaft when the gas pedal is pressed. The resting position of the throttle plate closes the large opening thru the center of the carb. When pressing your gas pedal, you see the linkage on the outside of the carb move.
For now, your best bet is to let some one help you that can see and touch the motor.May 10, 2015 at 11:36 am #47932
<p>I was just asking if that’s how this carb works, again I’m new to this. But if I had a kart mechanic anywhere around here is definitely go to them. But until then I’d like to try to figure this out. All I know is fuel is not getting into the motor and no combustion, but there is a spark. If you guys are as stumped as I am I don’t blame you. </p>May 10, 2015 at 12:34 pm #47936
Remove the air filter and fuel line from the carb. Place the palm of one hand over the inlet to the carb and with the other hand hit the starter for 3 or 4 seconds. You should feel some suction.
If the plug is at all wet, replace it or remove it until it’s dry.
Is the throttle plate moving when the gas pedal is depressed?May 10, 2015 at 8:15 pm #47949
I’ll Che k that tomorrow. Also, what does it mean when I look for a new piston and it says Red Dot or Blue Dot?May 11, 2015 at 7:41 am #47980
General piston info: http://ekartingnews.com/forums/topic/pailla-leopard-questions/May 11, 2015 at 8:27 am #47984
Did you put new crankshaft seals in it and seal the split line? Did you take the carb apart again and check the gaskets. The pulse has to get up to the pump. Did you mess with the reeds? Is the fuel line wired on to the carb so it doesn’t have an air leak?May 11, 2015 at 12:48 pm #48004
I’m thinking its to low of compression from the old piston and ring. Maybe when I put it back together it’s too low now and it won’t suck up the gas through the carbMay 11, 2015 at 1:09 pm #48006
Well pour a little gas in the spark plug hole and see if it fires up for a few seconds. That’ll tell you if the basic engine is working.May 11, 2015 at 2:12 pm #48013
I did that, no combustion. But the piston and everything is working how it should. It went together exactly how it came apart.May 18, 2015 at 10:28 am #48410
<p>My bore measured 53.47. I can only find Pistons starting at 54 on Comet Kart sales.</p>May 18, 2015 at 3:35 pm #48431
You said it was running before you worked on it so it should run. Did you re-check the ground and all the wires and try a new plug?
GifMay 18, 2015 at 5:26 pm #48435
Yep, everything went together and plunged in the same way it way before. Just after the rebuild no fuel is being sucked up into the motor, just the carb. And the carb is fine so I still can’t figure it out. I guess once the new piston comes in I’ll see if it actually was a compression issue. I also tongues everything to specs so that may have been another issue beforeMay 18, 2015 at 5:34 pm #48438
Your compression should easily exceed 200 psi. The bore cannot possibly be 53.47, as the bore new is 54.00, so your tools or technique are off.
This is real basic, but are you choking the motor for a cold start? First start can be a bitch for a rebuilt Leopard. To choke it, put the air box on and place your hand over the inlet tubes. You might have to slightly wedge open the throttle with a piece of thin (3mm) plastic or get somebody to manipulate the throttle. You actually can leave the key in cranking position and have one hand doing the choking and the other working the throttle. I’ve also resorted to spraying starting fluid in the inlet.
You haven’t clarified whether you were using the key start ignition before the rebuild, or if that also is new. The crank trigger magnet for a push-button Leopard is different than for a key start, so if you mixed them up you can get a very weak spark but no start.
At low speed cranking (like with a starter) the carb can dump too much gas into the air intake plenum, so you’ll get leakage of the excess gas out of the plenum, that you might interpret as gas not getting into the motor.May 18, 2015 at 5:36 pm #48439
I know very little about tag engines but, from what you said about the bore size you either measured wrong or you don’t have a leopard. If the measurement was correct then I think you have a Iame jaguar. I know the two engines are very similar but I don’t know exactly what parts cross over.May 18, 2015 at 6:28 pm #48440
Sorry I thought I deleted that comment, it’s a Leopard I just measured wrong sorryMay 18, 2015 at 6:41 pm #48443
I actually got the key ignition kit from comet kart sales. Came with everythingMay 18, 2015 at 6:42 pm #48445
I never thought of choking the motor like that, I’ll let you know once I try it. Thank you all for the help
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