07-29-2020, 03:47 PM | #1 |
Not Yet Wild
Join Date: Apr 2011
Posts: 54
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Cart has no power
You guys help me years ago with a carburetor problem. It's run GREAT ever since.
So, here is my new problem. Long story short I bent and replaced the exhaust valve. It now runs but has a slight backfire and has no power. Any thoughts? I used to step on the gas and it would jump, now it just putters. |
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07-30-2020, 04:43 PM | #2 |
Photoshop Guy
Join Date: Aug 2012
Location: Canal Fulton, OH
Posts: 3,845
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Re: Cart has no power
What model year golf cart?
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07-30-2020, 07:06 PM | #3 |
Not Yet Wild
Join Date: Apr 2011
Posts: 54
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Re: Cart has no power
1986 club car
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07-31-2020, 04:59 AM | #4 |
Photoshop Guy
Join Date: Aug 2012
Location: Canal Fulton, OH
Posts: 3,845
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Re: Cart has no power
How's your compression? When you put the cylinder head and valves back together, did you put the little tappet caps back in and check valve clearance at TDC on the compression stroke?
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07-31-2020, 08:25 AM | #5 |
Not Yet Wild
Join Date: Apr 2011
Posts: 54
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Re: Cart has no power
Compression is 100 psi. and holds. Caps are in. Not sure about vale clearance.
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07-31-2020, 10:19 AM | #6 |
Photoshop Guy
Join Date: Aug 2012
Location: Canal Fulton, OH
Posts: 3,845
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Re: Cart has no power
100psi of compression is good. Should be between 80 and 120.
Those tappet caps come in a few different sizes. When you re-installed, it’s possible that you may have swapped them. They can be accessed through that little cover on the front of the motor and with some finesse you can pry the springs back and take the caps out with needle-nose pliers or a small magnet (this is much easier to do with the body off so you can get down in front to see what you’re doing). Also, was the replacement valve you installed a new valve or an old one? Did you ever have the side cover off? If so, did you set the timing properly by lining up the marks on the gears? |
08-05-2020, 02:50 PM | #7 |
Not Yet Wild
Join Date: Apr 2011
Posts: 54
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Re: Cart has no power
The tappet caps looked like the same size. It is possible they got switched.
The valve was new. We only took off the head to replace the valve. Would that have messed up the timing? We never saw the gears. As you can tell, I'm a novice.Thanks in advance for any more advice. |
08-06-2020, 08:30 AM | #8 |
Not Yet Wild
Join Date: Apr 2011
Posts: 54
|
Re: Cart has no power
OK, a little background. I bought a new fuel pump for my cart and a new spark plug came with it. I assumed it was the right one. It wasn't. That is how the valve got bent. It hit the plug.
Question, could this have messed up the timing? If so, how would you get to the timing marks? |
08-06-2020, 09:46 AM | #9 |
Photoshop Guy
Join Date: Aug 2012
Location: Canal Fulton, OH
Posts: 3,845
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Re: Cart has no power
I doubt it would have affected the timing unless the plastic camshaft gear teeth were damaged from the impact. In order to check timing you have to remove the drive clutch and side cover to make sure the timing marks are lined up. I just posted a sticky recently showing photos of the timing marks when doing a rebuild:
https://www.buggiesgonewild.com/showthread.php?t=166885 |
08-06-2020, 09:59 AM | #10 |
Not Yet Wild
Join Date: Apr 2011
Posts: 54
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Re: Cart has no power
It must have hit pretty hard. It flattened the plug.
Do you think it would be worth pulling the cover to check? As far as you know, are the tappet caps the same or different sizes between intake and exhaust? |
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