Snowblower won't start - Carburetor Problem - Snowblower Forum : Snow Blower Forums
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post #1 of 24 Old 02-20-2019, 09:37 PM Thread Starter
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Snowblower won't start - Carburetor Problem

Hey all,

I have a Craftsman 247.883940 that I bought back in 2015. It has been used once, but was not stored properly over the summer. Now it won't start at all; any and all help/advice will be greatly appreciated!!

Primary troubleshooting steps taken so far:
1) Checked snowblower for spark - checked good since it does turn over if you put gas into the cylinder.

Based on the above, I am thinking it has to be the carburetor or possibly the primer button. I have searched for videos on tricks for carb problems and didn't find much of anything except that I need to rebuild the carb.
After digging online, it appears my engine is a 375-Qu and the carburetor itself is an Mtd 951-05118B.

After more searching online, I have not been able to find a rebuild kit for the Mtd 951-05118B. However, my searches and video watching gave me the impression that I should be able to disassemble, clean the carb and reassemble ... reusing the same parts.

So, that's question 1 then, can you clean and rebuild a snowblower carb without using new parts?
I suspect the answer is No, because I tried that, but the thing still won't start!!! I drained the old gas, removed the carb, disassembled, cleaned, and reassembled, and filled with fresh gas. Yeah, still "no joy" I did skip/miss one step ... I didn't remove the plastic metering plug ... ? Could that be the issue???

So, I want to redo the rebuild, but as I said, I have not been able to find a carb rebuild kit for the Mtd 951-05118B ... ? So, what next? Does anyone know of a reliable source to find the rebuild kit for the Mtd carb (951-05118B). I could replace the whole carb, but that makes me nervous since I can't understand why the clean/rebuild didn't work???

Please help ... any pointers/advice will be greatly appreciated!!!

V/r,
John
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post #2 of 24 Old 02-20-2019, 09:48 PM
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go back to cleaning the carb....every hole and orfice is important...... well thats what my wife keeps telling me.

Bought a dead but now fixed 1980ish craftsman II 10/28....ITS ONE HEAVY BEAST

MY VIDS ON FIXIN HER UP

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post #3 of 24 Old 02-20-2019, 09:52 PM
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Theres always a good, no great, chance that you didn't get all the passages cleaned out. This type of negret ponts directly to carb problems. Order the new one and enjoy the snow.
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post #4 of 24 Old 02-20-2019, 09:56 PM Thread Starter
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Quote:
Originally Posted by vinnycom View Post
go back to cleaning the carb....every hole and orfice is important...... well thats what my wife keeps telling me.
OMG ... too funny!! Thanks, I needed the laugh. Also ... Thanks so very much for the prompt reply!!!

So just to clarify, are you saying that reusing the old parts should be fine? So, gaskets can be reused, etc?

Thanks again - Best regards,
John
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post #5 of 24 Old 02-20-2019, 10:11 PM
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Quote:
Originally Posted by Sherm008 View Post

So just to clarify, are you saying that reusing the old parts should be fine? So, gaskets can be reused, etc?
Yes, as long as they're not torn or have gouges dug into them or something reusing the old gaskets is fine.
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post #6 of 24 Old 02-20-2019, 10:16 PM Thread Starter
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Originally Posted by cdestuck View Post
Theres always a good, no great, chance that you didn't get all the passages cleaned out. This type of negret ponts directly to carb problems. Order the new one and enjoy the snow.
Thanks so much for the reply!! Yeah, I was leaning in that direction (just get a new one) ... was just thinking about taking 1 more crack at rebuild, since the carb seems generally pretty simple and the snowblower is virtually new (only used once). But ... maybe "simple" is a bad assumption. And, maybe "used once" + "4 years old" + "bad gas" = "bad carb"

Thanks much again - Best regards,
John

Last edited by Sherm008; 02-20-2019 at 10:21 PM.
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post #7 of 24 Old 02-20-2019, 10:22 PM Thread Starter
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Yes, as long as they're not torn or have gouges dug into them or something reusing the old gaskets is fine.
Cool, that is good to know ...
Thanks so much again for the reply!!!

Best regards -
John
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post #8 of 24 Old 02-20-2019, 11:05 PM Thread Starter
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Sorry guys, but 1 more question ...

Does anyone know the right torque value for carburetor nuts for this MTD engine? I.e. the torque value for the nuts that bolt to the 2 studs that secure the carb? Or, is there a general "rule-of-thumb" torque value that should work?

Thanks so much again in advance - Best regards,
John
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post #9 of 24 Old 02-21-2019, 01:03 AM
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Originally Posted by Sherm008 View Post
Does anyone know the right torque value for carburetor nuts for this MTD engine? I.e. the torque value for the nuts that bolt to the 2 studs that secure the carb? Or, is there a general "rule-of-thumb" torque value that should work?
MTD General Torque Specifications attached below...
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post #10 of 24 Old 02-21-2019, 06:28 AM
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Have you tried to give it a shot of ether in the spark plug hole then try to start it to see if it is even a fuel problem. It could be a spark issue
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