jd 300 carb problems?
Posted November 08, 2011 - 11:39 AM
Posted November 08, 2011 - 11:53 AM
Posted November 08, 2011 - 12:04 PM
If you a rubber line on the end of a propane bottle, then move the line around the carb, you can usually find the leak as the engine will smooth out once the leak starts sucking the propane.
Posted November 09, 2011 - 05:51 AM
Posted November 09, 2011 - 08:06 AM
Head gasket is also a good possibility as are a missed port in the carb. If you don't find an air leak, you might try running some gas heavy with a cleaner like Seafoam. After doing that, I have had luck by getting the RPMs up, then putting my hand over the intake for a couple of seconds. Repeat several times and hopefully you'll pull the plug thru.
Posted November 09, 2011 - 11:30 AM
Posted November 09, 2011 - 06:31 PM
Posted November 09, 2011 - 08:00 PM
Is there a right up on how to adjust the points? Maybe they need to just be replaced to. If it has to do with the points why would it run good with the choke on though? The choke has nothing to do witht the points.
If you have a week or poorly timed spark sometimes extra fuel will keep it running. That's my theory anyway. The points are easy to adjust. Download the Kohler K series manual from Kohler's site. You set them to .020 when they are open. If the push rod, cam and points are in good shape the timing will be correct when the gap is .02.
You can usually see oil leakage around the head and cylinder if the head gasket is leaking. If you remove some of the engine covers you can get a good look at the fins. As I said above you should check all this stuff anyway on an old engine that is not running properly. Everything is suspect, particularly if it has been neglected.