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Still can't get my MS carb adjusted on a 49 B
:

Dick L?

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Matt

08-04-2001 16:46:07




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Well, I tried for probably 2 hours this afternoon to dial in the MS carb on my 49 B. The symptoms/problems are that it coughs and pops when a load is applied to the engine (like going up a hill or pulling the bush hog). I've done several things tuneup wise, and lastly have been trying in vain to adjust the carb. I got some adjustment procedures from Dick L, and followed them to a T. It still sputters, coughs and pops. This tractor starts easily, idles great, and will run fine on a level surface. From past postings on this site, I have heard many of you curse the MS carb and said you've thrown them out in favor of Zenith carbs. I'm about ready to do that, but before I go and spend $160 bucks, I just want to get some more thoughts from you all. Considering this tractor runs pretty well aside from what I'm describing, does it sound like a carb problem? I'm struggling.

Thanks, Matt

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Dick L

08-06-2001 10:06:30




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 Re: Still can't get my MS carb adjusted on a 49 B - Dick L? in reply to Matt, 08-04-2001 16:46:07  
Not being there to actually listen to it, your discription sounds like it is starving for gas through the power jet. It also could be that the air vent to the gas delivery tube is pluged or the little holes in the sides of the delivery tube are pluged. Remember when bulilding a new carb they start with a bare casting and add little brass parts to make it work properly. The one you have will work when you find the bug, which could be someone put ( a )or ( some ) little brass parts that didn't belong for that engine before you got the tractor.

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Phil Auten (Tx)

08-05-2001 09:29:01




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 Re: Still can't get my MS carb adjusted on a 49 B - Dick L? in reply to Matt, 08-04-2001 16:46:07  
Matt,
Are you 100% confident in your ignition and governor? These can and will cause the symptoms you describe. Be sure the spark plug wires are copper core and not resistance wire. Check the plugs for condition and replace them if they are covered with dry, sooty looking deposits.
Go at least two heat ranges hotter when you do replace the plugs. If your B has a mag, replace the condenser. It's cheap and they fail a lot. Even a brand new one can be bad.
If your B has a distributor, replace the condenser for the same reasons.
Check the timng again.
Check the advance mechanism in the mag/dist. to be sure it is functioning.
Check the governor to be sure it functions smoothly and properly.
Let us know what you finally find.

Phil

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Matt

08-05-2001 16:00:49




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 Re: Re: Still can't get my MS carb adjusted on a 49 B - Dick L? in reply to Phil Auten (Tx), 08-05-2001 09:29:01  
Phil,

Here's what I've done so far -

Mine has a distributor (not a mag)

replaced condensor and points
replaced spark plugs
replaced cap/rotor
cleaned carb (twice)
drained tank and cleaned petcock
replaced fuel line
replaced manifold gasket
adjusted the carb til I'm stinky (with exh fumes)

What I haven't done, or tried to do:

Tried to adjust timing, but I don't think I was turning the right part of the dist. It's comes out of the governor and then does a 90 deg. turn upright. I was loosening the actual dist. and trying to adjust it and see if there was any change in the engine. (you know, just like a typical car dist.) It didn't do anything. So, I'm wondering am I supposed to loosen and turn the part that comes out of the governor.(?) Haven't replaced plug wires

That's it.

This B model has a coil and distributor. Is there a way I can do a voltage/resistance type check on the coil with a multi-meter? I have one.

I haven't been able to use this tractor yet, and I bought it in March. As you can imagine, I really want to get it running properly. The grass is getting TALL.

Any input, it greatly appreciated.

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steve

08-05-2001 19:05:47




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 Re: Re: Re: Still can't get my MS carb adjusted on a 49 B - Dick L? in reply to Matt, 08-05-2001 16:00:49  
you need to get a timing light or have someone time the distributor for you with a light. it sounds like you are close, but if you have been turnign it by hand and dont have a light or not chekcing the fire mark on the flywheel, then you are probably off a few degrees and that would effect the high speed advance and act as you describe.



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larry (lazza)

08-06-2001 05:03:30




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 Re: Re: Re: Re: Still can't get my MS carb adjusted on a 49 B - Dick L? in reply to steve, 08-05-2001 19:05:47  
Yeah mate I had an international with the same problem & i drilled out the jets in the carby & it let more fuel through & gave it more power & revs. Other than that you'll have to fit a different Carby with bigger jets in it. regards Larry. PS. best of luck with it.



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Jeff

08-06-2001 01:29:09




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 Re: Re: Re: Re: Still can't get my MS carb adjusted on a 49 B - Dick L? in reply to steve, 08-05-2001 19:05:47  
One other thing ,always use a high octane gas .I had the same problem and switched to a higher octane and it cleared up. Just a thought.



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