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No more knocking, but popping

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lefler

01-31-2001 15:36:58




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TO-35
was home today messing with the tractor, while the engine was running and popping from under the battery area, not exhaust pipe, i,d pull the choke out slowly the noise would stop. Ray thinks an intake problem, i'm leaning that way myself. any other suggestions? thank,...tom




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Ray,IN

01-31-2001 18:20:55




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 Re: no more knocking, but popping in reply to lefler, 01-31-2001 15:36:58  
Another possibility may be too lean power valve mixture. Try opening the valve approx. 1/16 turn at a time. If the motor stumbles upon quickly opening the throttle, open more. The engine should accelerate smoothly when you reach proper adjustment. Too lean fuel mixture will burn valves, too rich wastes fuel, better too rich than lean. The manual states:idling screw initial opening = 7/8 of a turn;the main jet = 1 1/4 turns initial opening.This depends upon the electrical system being in good condition, ie: points. timing, coil, plugs & wires, battery condition, etc.

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dennis

01-31-2001 16:38:53




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 Re: no more knocking, but popping in reply to lefler, 01-31-2001 15:36:58  
I'd suggest a broken valve spring. Mine did something similar - twice. I replaced the one broken one wiht a new one and it broke again ! Replaced them all with an overhaul and the problem stopped. I found my problem with a compression test. The boken spring wouldn't allow the vavle to close all the way and was firing thru the open valve into the next cylinder. Could be a head gasket too but it's easier to take the valve cover off and check first than it is to remove the head. Do the compression check - it's the easiest.

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Dave

02-01-2001 04:17:26




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 Re: Re: no more knocking, but popping in reply to dennis, 01-31-2001 16:38:53  
Where did you find new valve springs. I have 4 that were broken and replaced them with used springs I found laying around the shop for short term fix. I have yet to find a source for new replacements.
Thanks Dave



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dennis

02-02-2001 15:09:17




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 Re: Re: Re: no more knocking, but popping in reply to Dave, 02-01-2001 04:17:26  
I got my springs at my local JD dealer. THe Local MF dealer also had them and I found out later I could get them thru my local auto parts store. Continental engine parts and ohaul kits are very available. Other parts such as front end stuff, pump , seals, etc I got at the JD dealer. He said any tractor dealer that deals with TISCO parts distributor can get most everything you need for a Fergy.



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Paul in NM

02-02-2001 05:16:31




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 Re: Re: Re: no more knocking, but popping in reply to Dave, 02-01-2001 04:17:26  
Dave, almost any good auto parts store can order you valve springs for any Continental engine.

Paul



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lefler

02-01-2001 04:52:20




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 Re: Re: Re: no more knocking, but popping in reply to Dave, 02-01-2001 04:17:26  
check with dennis,perhaps i to will be looking for new springs, thanks,...tom



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David Waymann

01-31-2001 18:19:08




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 Re: Re: no more knocking, but popping in reply to dennis, 01-31-2001 16:38:53  
I'm inclined to agree with Dennis--do a dry and wet compression test. Take the valve cover off and inspect the valve springs, etc. Even run the engine with the valve cover off, remove spark plug leads one at a time, open the choke, etc. to see if the noise can be isolated. Any chance that when the rod bearings were done, that something was not tightened down properly? Good luck, David



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