wont stay running

[heavyb13]

I have an 08 Mac 54 250 b it starts right up and idle but chokes when u gas it and dies any idea?

[inuyasha]

Hi
This can be caused by a faulty petcock (or vacuum leak), bad hoses, clogged fuel filter, stuck float,bad or improperly adjusted intake valve, bad fuel pump.
Your just going to have to check them one by one until you find the culprit
Take care and ride safely
Yours Hank

[heavyb13]

The guy I got it from put a new Carb on it.where could I find a diagram of the vacuum hoses? And do you think it could be the cdi box? The filter is brand new flows good. Thanks for the help to

[blueboy5000]

No it's not a CDI, Coil, or any form of spark issue. You have a fuel problem, most likely a clogged main jet.

I would start by cleaning the carb, sometimes even brand new carbs come dirty. I clean every carb before I install them.

[Ebuddy]

Could be the auto-choke/auto-enricher as well, they are known for going bad. I agree with Hank though, could be anything on that list. I've not often seen a petcock go bad or valves get THAT messed up, but that's just my experience - I know it happens. Just do a google search for the proper hose configuration and look at the images. Sometimes you have to look at a few but you'll see pretty quickly what needs to go where.

[heavyb13]

OK thanks for the help guys

[heavyb13]

I notice today the oil was way over filled. Thin and smelt just like gas ow is it getting to the oil?

[blueboy5000]

I notice today the oil was way over filled. Thin and smelt just like gas ow is it getting to the oil?


Remove the fuel line from the carb. Only about 1/2 oz of fuel should spill out. If fuel keeps spilling out, you have a bad petcock. This is fairly common with OUTSIDE of tank GRAVITY FED petcocks. Replace the petcock (if it is an OUTSIDE tank petcock, replace it with a 3/16" FUEL SHUT OFF SWITCH available at Advance Autoparts or any power equipment shop for $10) and drain and replace the engine oil.

If you remove the fuel line and only 1/2oz fuel comes out, remove and clean your carburetor, as it most likely has a stuck (OPEN) float.

[heavyb13]

OK thanks. Will let u know what happens when I get done work

[heavyb13]

OK so I took the gas line off and the little's bit of gas can out not much so cleaning the Carb right now

[heavyb13]

The Carb wasn't dirty at all and the floats were working right. So what now?

[blueboy5000]

well if you have ruled out the stuck float, and the fuel petcock,then there should be no reason you have gasoline in the oil other than it simply flooded. Drain and refill the oil.

[heavyb13]

OK the tag under the seat said 10 w 40 and the case says 15 w40

[heavyb13]

Which would be best

[blueboy5000]

Either one is fine

[heavyb13]

OK and what would make it shut off every time I let off the gas and when I take off it kinda pukes. When it shits off it will start right back up tho

[blueboy5000]

A mis-adjusted or dirty carb. I know you took the carb apart and it didn't "look dirty", but there is obviously a problem. Of you disassemble the carb, and clean it with carburetor cleaner, you will see the problem.

What you are describing sounds like a clogged main jet, but could be any number of things. There's just no way to speculate. The only way to find out is to disassemble the carb.

[heavyb13]

OK will do that tonight. Could I spoke it overnight in gas?

[blueboy5000]

No don't do that. The best thing to do is to clean it with carb cleaner. Soaking it in gas will make resin deposits.

[Ebuddy]

I find brake cleaner to help also. It seems to come out with slightly more pressure. I agree, it sounds like the main jet. In addition to the carb/brake cleaner, go through every little hole with a small pin or piano wire.

Still could be the auto-enricher/auto choke, if you have one. They're about $10 so if after everything else, it's worth taking a chance.

[inuyasha]

I find brake cleaner to help also. It seems to come out with slightly more pressure. I agree, it sounds like the main jet. In addition to the carb/brake cleaner, go through every little hole with a small pin or piano wire.

Still could be the auto-enricher/auto choke, if you have one. They're about $10 so if after everything else, it's worth taking a chance.
Hi
Thats excellent advice:tup::clap:
I have one of these for that
http://www.powersportsplace.com/parts/ptm-pp2453?seid=pspse1&gclid=CNOJy8WL7rgCFcOh4Aod22IARA
Take care and ride safely my friend
Yours Hank

[heavyb13]

OK so I cleaned the Carb and put back together still does the same thing I unplugged the auto choke and it doesn't run any different so I will try that I guess. Where could I get one?

[blueboy5000]

The enricher is not the problem if it still does the same thing when you remove it.

At this point, I would get a new carb.

[Ebuddy]

The enricher is not the problem if it still does the same thing when you remove it.

At this point, I would get a new carb.

He said he unplugged it, but if the enricher itself isn't completely blocked off, it could still cause issues.

That said, I agree with you. Carbs are pretty inexpensive and at this point it's probably not worth the aggravation to keep farting with it. :cheers:

[bhinch]

Hi....I would adjust the valves and then adjust the idle. Low compression will cause a host of probs.

[heavyb13]

Put it back together today. Nothing helped. It acts as if it gets way to much gas for low rpm runs great when it clears up almost sounds like a miss

[heavyb13]

I need a good site for parts please

[inuyasha]

I need a good site for parts please
Hi
Scrappydogscooters
http://www.scrappydogscooters.com/
Its run by a fellow member and good friend Rick Main
http://www.scootdawg.net/member.php?u=8733
Take care and ride safely
Yours Hank