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Old 03-06-2017, 08:23 PM   #1
jeeperstrudie
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Default 91 par car - combustion problem

I have a 91 par car, i have plenty of vacuum and am getting gas to the carb, getting good spark, no combustion.

I removed the air cleaner and can spray starter fluid into the carb and will get combustion, but seems like there is a blockage in the carb. i have the stock carb and have just torn it apart and have it soaking, i'm new too golf carts and probably a stupid question, but am I missing something? Also, where can I get a cheaper rebuild kit? or new carb all together?
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Old 03-08-2017, 09:16 AM   #2
jeeperstrudie
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Default Re: 91 par car - combustion problem

So an update...hoping for some feedback

Have spark
have 95 lbs of compression
Have gas from the fuel pump to the carb
carb is getting fuel into bowl and it appears it may be getting fuel past the bowl because it drips out of the fresh air intake opening when I attempt to start it.

Engine will not show signs of combustion unless I spray starter fluid into the carbs fresh air intake. Is this a crank seal problem? looking for some confirmation before I pull the engine and order seals, is there any other way to fix seals without pulling motor?
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Old 03-08-2017, 09:49 AM   #3
Lochlin
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Default Re: 91 par car - combustion problem

Good work on diagnosing things. Compression is right where you want to be. That you are getting gas to the carb is a good thing. Now, you want to to test to make sure that you are getting gas from the carb to the cylinder.

Take out your plug, squirt some starter fluid or fuel directly into the cylinder then see of she'll fire up for a couple of rotations. If so, you know your problem is that you aren't getting gas from the carb to the cylinder (which is probably the most common problem with these things). Crank seals are normally the culprit but, like you said, it could be a carb issue as well.

Unfortunately, there is no way to fix a crank seal other than replacing them. Those seals have a rubber gasket on them that hugs the crank to prevent air leakage. That seal will crack over time and that's it for that. Good news is that replacement on the Columbias is way easier than on the earlier HDs in that you don't have to take the whole motor apart to replace them.

Regarding carbs, rebuild kits are available for those. To be honest, though, entire Chinese carbs can be had for less than the price of a rebuild kit (usually under $20). Go on Amazon and search "Par Car Carburetor" and you'll see what I mean. Take a look at the pics and see of they match what you have. You'll find them.

Those carbs were used on a lot more motors than just Par Car golf carts so you have to do a bit of searching
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Old 03-08-2017, 11:01 AM   #4
jeeperstrudie
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Default Re: 91 par car - combustion problem

thanks Lochlin, is this the only seal kit I need?

http://www.buggiesunlimited.com/golf...967-1995)/4755
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Old 03-08-2017, 01:19 PM   #5
Lochlin
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Default Re: 91 par car - combustion problem

Quote:
Originally Posted by jeeperstrudie View Post
thanks Lochlin, is this the only seal kit I need?
Nope! Those are the gaskets that go between each half of the crankcase should it ever need to be opened up. You don't need to split your case so replace your seals so you won't need those gaskets.

Crank seals are actually called "oil seals" in the shop manuals.

Part # BE11-100 for the clutch side. BE11-120 for the fan side. Google those numbers and you'll get some hits

The clutch side one is plastic and pretty simple to install. It can actually be don't without taking to motor out. The clutch comes off, remove the old seal, push the new one on and you're done.

The fan side one is a bit more involved as you have to remove the shroud, fan, fan base, ignition, oil pump, etc. I suppose you could do it with the motor in but it's pretty easy to pop one of these engines out. Takes all of about 20 mins. I would just remove it.

This should be the service manual to your cart:

http://www.buggiesgonewild.com/colum...UTILITRUCK.pdf

Lots of good stuff in there. Check out page 7-9.
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Old 03-14-2017, 08:51 AM   #6
tew45
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Default Re: 91 par car - combustion problem

Also check the reed valve. Probably it is good if you are getting gas to the cylinder but still! I am using a $25.00 Chinese carb on one cart and a welder and they seem to do a good job. And you are right it is probably flooding so try a new plug.
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Old 12-19-2017, 08:24 PM   #7
jeeperstrudie
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Default Re: 91 par car - combustion problem

So I got the cart running tonight, appears to be running really rich, using the stock WHL 10 carb, anyone have tuning instructions for this carb?
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Old 12-19-2017, 08:46 PM   #8
Lochlin
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Default Re: 91 par car - combustion problem

Here you go. See chapter 8.
Attached Files
File Type: pdf CPC_MANUAL_SERVICE_1991_1992_GSEL_UTILITRUCK.pdf (5.71 MB, 0 views)
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Old 12-19-2017, 09:50 PM   #9
jeeperstrudie
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Default Re: 91 par car - combustion problem

awesome, thank Locklin
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Old 07-26-2021, 04:00 PM   #10
moziomek
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Default Re: 91 par car - combustion problem

I have a 91 ParCar with likely same issue of worn oil seals. I've got them ordered and tearing fan side of motor down in order to replace. Ignition and fan shroud are off and now looking at large nut on shaft holding fan in place. Do I need to remove large nut and fan to get to oil seal? Also, there was a small shaft seal just under the nylon bushing holding the magnets. What is purpose of this seal? Thanks Mike
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