LT80 takes a long time to start
#1
LT80 takes a long time to start
Hi guys. Great website. I've done a bunch of work thanks to you all and really appreciate it.
I recently bought a nice looking LT80 from a friend. At first it would start right up when cold or warm by using the choke, then immediately turn off the choke it would run fine. No issues, except that you always needed the choke to start it. It had a new ebay carb on it at this point.
After a week or so it began to be pretty difficult to start, usually requiring about 10 seconds on the starter to get it running. Then it got to the point that it would only start if I hooked up a battery charger and had it turning really fast. Without the charger it seemed to turn over just fine.
So I bought a new OEM Suzuki (Mikuni) carb. Installed it and it was exactly the same thing. Takes a good 15 seconds or so to get running, but once it's running it idles great and seems to have decent power. If you shut it off it won't start without a really long crank and only seems to start with the choke on.
I checked the compression but my gauge is messed up so I'll check it again with a known good gauge tomorrow. My friend said he tested it at 108 psi a couple months back.
Sprayed around while running to look for air leaks and couldn't find any.
Ran it without the air filter hooked up with no change.
OEM petcock was replaced with a standard on/off/res type... blocked off the rear vac line on the carb, fuel filter is between valve.
Tried a new spark plug and it seems to have good spark when out of the cylinder.
I'm guessing it's going to be time for a rebuild but hoping I'm missing something here.
Thanks in advance.
-Mag
I recently bought a nice looking LT80 from a friend. At first it would start right up when cold or warm by using the choke, then immediately turn off the choke it would run fine. No issues, except that you always needed the choke to start it. It had a new ebay carb on it at this point.
After a week or so it began to be pretty difficult to start, usually requiring about 10 seconds on the starter to get it running. Then it got to the point that it would only start if I hooked up a battery charger and had it turning really fast. Without the charger it seemed to turn over just fine.
So I bought a new OEM Suzuki (Mikuni) carb. Installed it and it was exactly the same thing. Takes a good 15 seconds or so to get running, but once it's running it idles great and seems to have decent power. If you shut it off it won't start without a really long crank and only seems to start with the choke on.
I checked the compression but my gauge is messed up so I'll check it again with a known good gauge tomorrow. My friend said he tested it at 108 psi a couple months back.
Sprayed around while running to look for air leaks and couldn't find any.
Ran it without the air filter hooked up with no change.
OEM petcock was replaced with a standard on/off/res type... blocked off the rear vac line on the carb, fuel filter is between valve.
Tried a new spark plug and it seems to have good spark when out of the cylinder.
I'm guessing it's going to be time for a rebuild but hoping I'm missing something here.
Thanks in advance.
-Mag
#4
Yes, the exhaust seems to be flowing fine. I’ll check the compression with a good gauge tonight and report back.
#6
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raptor720
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04-15-2002 11:29 PM
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