1995 9/29" Model 536.887992 Carb Jetting? - Snowblower Forum : Snow Blower Forums
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post #1 of 14 Old 12-27-2016, 02:29 PM Thread Starter
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1995 9/29" Model 536.887992 Carb Jetting?

Hello everyone,


I received a brand new (used once) Craftsman 9/29" blower Model # 536.887992 on a trade for a refurbished Lawn Boy 2 stroke. It is very clean and minty. It starts good and surges at idle. Using it in the snow I 've noticed that it is beginning to surge a little even in the deep stuff.


Does anyone know what the stock jet size is? Would a one size up jet/drill or replace solve the surging in the snow? It seems a little lean as the plug shows to be a little white hued in color.



Also I've noticed that on my hills I could use more traction without chains on the coated asphalt drives. I've seen the 10/11hp 30" use a wider more aggressive wheel/tire set up.
Anyone know the size of these set ups? Pic below.



Let me know thanks!
George

Last edited by GTP; 12-27-2016 at 02:54 PM. Reason: Adding pictures
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post #2 of 14 Old 12-27-2016, 02:58 PM
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Unless you really know what your doing, I wouldn't be playing with the jets. AI have never been able to find much info on Tecumseh jets sizes and numbering. I would either try rebuilding the carb and or buy a adjustable Chinese knock off, to replace the original.




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post #3 of 14 Old 12-27-2016, 06:47 PM
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Quote:
Originally Posted by Motor City View Post
Unless you really know what your doing, I wouldn't be playing with the jets. AI have never been able to find much info on Tecumseh jets sizes and numbering. I would either try rebuilding the carb and or buy a adjustable Chinese knock off, to replace the original.

+1


I've replaced several carbs on various engines with non-adjustable carbs with Oregon's I've gotten off Ebay that have adjustable jets. As long as you get one sized for the engine you have and has the proper throttle and choke linkage to match what you have, it should be a direct replacement. Additionally I've tried some of the Tecumseh parts with those in these carbs and they've fit perfectly.
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post #4 of 14 Old 12-27-2016, 06:51 PM
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The Craftsman/Murray 11/30 I just completed had 16x6.50x8, axle size and length might be an issue for a swap??? Although it looks like they made the wheels accommodate the same axle length??
If you take the carb heater box off and look where the side screws were removed, there probably is a little black plastic cover near where the carb mounts to the intake pipe. If you slip that off with a small screwdriver and reveal a slotted screw head, this cleanup may get rid of some surging.
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post #5 of 14 Old 12-27-2016, 09:32 PM Thread Starter
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The Craftsman/Murray 11/30 I just completed had 16x6.50x8, axle size and length might be an issue for a swap??? Although it looks like they made the wheels accommodate the same axle length??
If you take the carb heater box off and look where the side screws were removed, there probably is a little black plastic cover near where the carb mounts to the intake pipe. If you slip that off with a small screwdriver and reveal a slotted screw head, this cleanup may get rid of some surging.
https://www.youtube.com/watch?v=GT0STIPg4I8
Thanks everyone and thanks jtclays. I did a comprehensive carb cleaning - but can't remember getting that pilot jet out. Will try that and see how it does.

Has anyone a recommendation for an adjustable main jet? I know they make these aftermarket for a ton of things including the Predator Harbor freight motors.

Thanks
George

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post #6 of 14 Old 12-27-2016, 09:37 PM
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Agreed, don't start drilling out the jet making another problem worse. Keep as many variables constant
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post #7 of 14 Old 12-27-2016, 09:51 PM
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They DO sell the carbs with adjustable jets and I have been ordering these when a new carb is needed, May be ordering one for my new to me 10hp Tecumseh too. Just make sure it's the right carb with the right arms to match your old ones before you order, Just pus "adjustable jets after the carb you need in the search.
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post #8 of 14 Old 12-27-2016, 09:56 PM
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I flipped an almost identical 9hp Craftsman (green) last season. While I was able to get the snowblower running well without altering the carb, there is also this method of going one size larger by modifying the jet:



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post #9 of 14 Old 12-27-2016, 10:00 PM
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Do they have still have plastic emulsion tubes, or are they brass on the clone Tec aftermarket carbs?
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post #10 of 14 Old 12-27-2016, 10:05 PM
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I've gotten both, I think it may depend on the seller and I usually just go for the cheapest one I can find that fits the need.
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