Heep Big Problem - Need Help

[Countryboy243]

49 8N Front Mount Distributor 6 Volt, all original. Was having problem with starting. Had spark although somewhat weak. Checked points, was gapped correctly. Cleaned with dollar bill and reinstalled. Seemed a little stronger spark and started with difficulty. Next day would not start. Had purchased a carb rebuild kit several yrs ago so decided to install because shaft seemed to have excessive play. Replaced throttle shaft and plate, needle valve and seat and gasket.Used carb cleaner and blew out all passages. Did not replace adjustment needles or make any adjustment to same. Reinstalled making sure surfaces and gasket were smooth and clean. Started but with difficulty. Engine was badly overspeeding and throttle lever provided no control. Shut down immediately. Removed carb again and visually inspected and everything looked proper. Restarted this morning with same result. Can't let run to observe linkages because of overspeeding. What is the problem, what have I screwed up and hopefully I don't have governor problems. I have had this old tractor for 10 years and have solved many problems but this has me baffled.

 

[Dunk]

Sounds like something is holding the butterfly wide open.

See what it is.

Could be the linkage installed wrong somehow.

Could be the butterfly shaft is too tight.

 

[JMOR]

(quoted from post at 15:17:11 09/04/08) 49 8N Front Mount Distributor 6 Volt, all original. Was having problem with starting. Had spark although somewhat weak. Checked points, was gapped correctly. Cleaned with dollar bill and reinstalled. Seemed a little stronger spark and started with difficulty. Next day would not start. Had purchased a carb rebuild kit several yrs ago so decided to install because shaft seemed to have excessive play. Replaced throttle shaft and plate, needle valve and seat and gasket.Used carb cleaner and blew out all passages. Did not replace adjustment needles or make any adjustment to same. Reinstalled making sure surfaces and gasket were smooth and clean. Started but with difficulty. Engine was badly overspeeding and throttle lever provided no control. Shut down immediately. Removed carb again and visually inspected and everything looked proper. Restarted this morning with same result. Can't let run to observe linkages because of overspeeding. What is the problem, what have I screwed up and hopefully I don't have governor problems. I have had this old tractor for 10 years and have solved many problems but this has me baffled.

Rods swapped on two governor arms?

 

[Bill -- Banquete TX]

Can you reach in and manually hold the throttle butterfly closed and slow it down, or not? If you didn't try that do this: disconnect the linkage from the carb (make sure it doesn't fall down and get hooked on something that will bind it as the governor tries to move it around), and try cranking it up with the linkage from the governor removed. It should idle only. If it races, the problem's in the carb. If it's idling right, slowly, and so forth, with the throttle lever in idle position, hold the linkage up next to the carb 'ear' and see if it looks like it's lined up. If it is, kill the engine. It should as the engine dies pull towards full throttle. If it does all that, there's no reason why it shouldn't hook back up and run right..... UNLESS:

Some carbs have a 2nd hole in that 'ear' for different applications (a spring, different linkage, etc.) and it could be you have the throttle rod in the wrong hole. Was there a spring on it? I don't remember off hand if there should be a spring, and I'm 45 miles from my tractor or I'd go look. Seems to me there SHOULD be a spring somewhere. If that jumped off, or got in a bind, that could cause all sorts of issues, and if it finally broke and jumped off could cause it to go wide-open on you, and also be why you missed it putting stuff back together.

Good luck!

Bill
9N 88110
3010 JD 31871

 

[Donlo]

Try jumper across terminals of resistor.If resistor is bad you will get weak spark but not enough to start.Have seen this on acouple of 9n tractors ive had.Resistor is up under dash on left side

 

[Bruce (VA)]

Sometimes the bigger the problem appears, the easier the fix is.

Like JMOR sez, you wouldn't be the first guy to hook up the carb & governor linkage bassackwards. BTDT. Or, leave the rotor on the workbench & spend 15 minutes trying to find out why you los spark after a tune up.

Check the linkage.
50 Tips

 

[Dell (WA)]

countryboy........yer ORIGINAL problem was NOT chur'carb but it sure is NOW.

Do you know you have what we used to call buck-fever but is really "carb-fever"? You screwed-up big-time.

Your original problems was weak sparkies and you know it. It was NEVER yer carb. You just caused MORE problems ferryerself. Bad boy.....naughty-naughty.....scold-scold. No supper for you. (grin)

Did you know you can operate yer engine WIDE-OPEN and it will NOT HURT it??? WOW.....whatta revelation.

Did you know you can start yer engine without the eazy-to-remove spring-loaded governor-to-carb throttle rod??? Un-snap yer throttle rod. You do know how to do that, don't you?

Now make certain you have the "correct" governor linkages routed, and your carb throttle shaft freely rotates and putter back together and try again........respectfully, Dell

 

[Countryboy243]

Problem solved. I had installed the throttle shaft with the flat for the plate at 11:00 whereas it needs to be at 1:00. Made the change and it runs smooth as silk from idle to full. The old carb needed a good cleaning (with proper reassenbly). Thanks to everyone who helped and may I say I have enjoyed many hours of entertainment from lurking on this forum.

 

[Bill -- Banquete TX]

OR.....

This gets me a laugh every time I think of it. When I was 8 or 9 years old, my mom's little 110 JD lawn tractor quit, with Dad driving it. Looked into gas tank: Empty. SOOOOO>>>> he goes and gets the red jug and fills the tank. Crank crank crank and nothing. Plenty of spark, fires with ether, will NOT run. Off comes the carb. Into pieces goes the carb. Clean it up and put it back together and put it back on. Crank crank crank, nothing. Off comes the coil--maybe it's not a hot enough spark. Sand sand sand on flywheel.... put it back together.... nothing....

SO..... maybe it's in the engine. Out comes the sparkie again, and after a trip to town to borrow a compression tester, maybe it's this, maybe it's that.... we had the tractor in a zillion pieces all over the front yard when the neighbor sees us and pulls in. Walks over to the mess, looks at it, unscrews the top to the full fuel tank that's sitting on the tractor seat, and sticks his finger in. One word out of his mouth made us both feel like total idiots. That word? "Diesel."

(Dad had picked up the wrong red can)


Put 'er all back together, filled tank with GASOLINE and it ran like a top!