I have done everything still doesnt start

[josh_grace]

So i have been working on a 6hp carter go kart with a OHH60 tecumseh engine. I got it from a friend to try to fix it because it sat for a 2 years without use. When i got it home i did the basics and checked spark fuel compressions and the carb and it was all fine except the carb. The go kart only turned over when i sprayed crab cleaner into the carb but then it would die i tried cleaning it but that didnt work so i got a new one. When i got the new one and put it on it started up in a few pulls but ran a little weak cause when i touched the gas it died so i let it sit for a out 7 mins and it did the same thing so i had someone hold the gas when i started it and after a few pulls it made a loud bang and shot out black smoke but started running good. The next day i come back i started back up still fine until i ran out of gas. i put more gas in and it wont start up, for a while it wouldnt even start with carb cleaner but i fixed the compressions because when i ran out of gas it back fired and messed up the gap on the OHVs. Now if i spray carb cleaner it pops but doesnt start and if i spray it in the spark plug hole it still only pops i have no clue on what to do now
(also i did check the float bowl and gas line for air pockets and there are none)

 

[pearl111]

I think this should be posted in ENGINES AND CLUTCHES, anyway I sort of had the same issue that you are having. When I checked my plug it had spark also (weak spark}. So I put in a new plug. It started right up and ran great after wards.

 

[anickode]

Well there are several other things it could be...

Spark problem (most likely) - magneto, plug, wires, (ohh60 shouldn't have points or condenser)

Compression problem (less likely) - head gasket, Piston rings, valves, cylinder damage

Timing problem (least likely as long as you haven't taken the engine apart) - cam, compression release, pushrods, lifters, flywheel key

Does it have a low oil cutout? Those can go bad or get stuck and kill your spark. Or there could be insufficient oil.

Oh and a side note, don't use carb cleaner as starting fluid. Starting fluid is bad enough, but at least it usually contains some sort of upper cylinder lubricants.

 

[itsid]

^^ THIS!

My bet's on misaligned cam shaft.

PO removed governor and wasn't taking care,
threw cam shaft back in in random direction,
then let it sit for two years (to self heal) and finally gave it away..
sounds like a plausible story to me

chances are by now the lifters/pushrods or even valves are at least slightly bent and the engine is just unable to breath properly as well
But you MUST check everything anickode listed anyways.
(well until you found the issue that is)


'sid

 

[Karttekk]

Put a spark tester between the plug wire and spark plug. Pull the rope and report how strong the spark is. Somewhere to begin anyway. Sounds like the coil is on its way out or has left the building.

 

[ezcome-ezgo]

Clearly your gap on the OHVs is out of whack. Change your font.

 

[josh_grace]

I just checked the gap for the OHVs and i set them all to the factory specs and it sounds like it wants turn over but it doesn't

 

[Nosandwich]

Cam is out of time. I'll bet a warm, flat beer on it.

ORRRR.....You didn't set you're gaps at TDC on the COMPRESSION stroke.

 

[mckutzy]

It sound like a case of the Tekashema blues to me..

Maybe a Predator (I'm guessing your in USA) might be in the works for you, and this is a project to come back to later...

 

[J.S.@SMS]

Try using starter fluid as it is designed to start an engine. Being that it pops instead of starting with carb cleaner, I'd say that either you over tightened the rockers or it has a bent valve. First pull the valve cover off, and check the valve lash. There should be a very small amount of play in the rockers. Or as others said it could be the cam.

 

[josh_grace]

Try using starter fluid as it is designed to start an engine. Being that it pops instead of starting with carb cleaner, I'd say that either you over tightened the rockers or it has a bent valve. First pull the valve cover off, and check the valve lash. There should be a very small amount of play in the rockers. Or as others said it could be the cam.

Ok but how could it be the cam shaft if i had it running at one point before it ran out of gas could it have been caused by the back fire.

 

[bob58o]

I agree with the people who say that valve lash probably isn't set properly.
Are you 1000% sure you set it correctly?

Or maybe a bent valve.

Or possibly a sheered flywheel key - causing the spark to happen at the wrong time.

Instead of debating the possibilities of what may have happened, you should start testing the things that the people who are trying to help you have suggested.

Get it straight, gentlemen, I'm not here to say please, I'm here to tell you what to do. And if self-preservation is an instinct that you possess, you'd better do it and do it quick. If my help's not appreciated, lots of luck, gentlemen. -Winston Wolfe

 

[karl]

It sound like a case of the Tekashema blues to me..

Maybe a Predator (I'm guessing your in USA) might be in the works for you, and this is a project to come back to later...

You cant accept defeat like that! That would be lame.

I agree with the cam, pull the sidecover and look! I have had governer gears come apart on them, and break a tooth off the camshaft, as they have nylon cams.

One you know your cam is intact and in time, set valve lash at tdc and pull the flywheel nut and look at the key. Then it should run.

 

[mckutzy]

Who said anything about defeat... I said shelve it for now...
If I said anything to the effect of defeat... It would have been along the lines of "why not take it out back and double tap it in the head(the motor of course) with a stout load of 000-buck, then drop it off the shelf of the ocean(after draining the fluids of course... ,) ).. Or something like that...

 

[karl]

Who said anything about defeat... I said shelve it for now...
If I said anything to the effect of defeat... It would have been along the lines of "why not take it out back and double tap it in the head(the motor of course) with a stout load of 000-buck, then drop it off the shelf of the ocean(after draining the fluids of course... ,) ).. Or something like that...

im just saying the concept of installing a chinese motor on it because you could not get the original unit repaired is weak, and that is defeat.

This is MURICA!

 

[itsid]

Mhe.. IDK,
I kinda understand Mac's point
Just because you want the rest of the year karting (as long as the weather's nice and such)
and you'd delay the repair to a more wintery month.
I don't think a 100buck chinese placeholder is a bad decision.

(better than buying a 400 dollar engine since that I would actually count as defeat!)

Frankly.. I think I'd gutted and reassembled that thing twice since this thread started already.. but people are different,
some don't like oily residue on their workbench *shrugs*

'sid

 

[bob58o]

I agree with gutting and reassembling. When I've tried everything I can think of and and still can't get something to work, I take it apart and put it back together. Sometimes I'm sure I put it back the same way I had it before, but it will work.

Make the engine great again!!!

 

[Nosandwich]

I agree with gutting and reassembling. When I've tried everything I can think of and and still can't get something to work, I take it apart and put it back together. Sometimes I'm sure I put it back the same way I had it before, but it will work.

Make the engine great again!!!

LOL....Send it to Trump!

He'll pull the cord and if it pops say:" You're fired!"

 

[itsid]

LOOOL

No politics guys *giggle*

'sid

 

[josh_grace]

UPDATE:
So the cam shaft is fine and I dont believe i mentioned this in the original but when i bought the new carb and the primer on it takes gas straight from the bowl and throws it into the carb but anyways it worked fine in the beginning but now everytime i pull start it gas shoots out in puffs so i just took a video of the inside of the carb and saw it was spraying out of a little pole in the middle of the carb with every pull the some pole that gas comes out of when i press the primer bulb.