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  Topic Review (Newest First)
02-14-2015 04:28 PM
cnbcook Put new carb on, took about 30 minutes since I only have 2 shrouds and no governor linkage/springs to deal with. I would say the corrugated silver tube is a heat shield. I also saved time by just cutting down my existing fuel line instead of replacing it. Ran perfect until I shut it off to talk to my annoying neighbor, it would not start back up after that. I'm happy enough, just won't be shutting it off again - at least when it's below freezing.
02-12-2015 05:46 PM
timreefer
craftsman 8.5/27

First attempt to use this on snow was same problem before carb work. Sputter , engage auger stall. Took it all apart and found wire from key switch to motor looked attatched looked attatched but when I checked it pulled right out of crimp. Reattatched runs flawless. Can't be happier with how it performs.
02-12-2015 05:05 PM
conwaylake
how to do this upgrade video

Took me about 2 hours. Too many layers of shielding brackets etc.

Most important part is to remember the linkage connections.
You will then replace with one of two provided springs .
I used 3600RPM as the Top No Load speed. Instructions will take it from there.

Also I used the middle-length shaft for the choke.
A foil tube provided is meant to go over the fuel line leading into the carb.
(I'm guessing that is the vapor lock protection


HowTo video:




02-12-2015 02:01 PM
cnbcook Thanks! I will pick the kit once I confirm which engine I have. This thrower is the biggest piece of crap I have ever owned and I hate to put any $ into it but $50 is fine until the intermittent lack of forward drive gets too bad.

Edit: Picked up kit 590907 from Amazon since I have Prime and cheaper than Sears. Thanks again Conway.
02-12-2015 01:18 PM
conwaylake
carb replacement for B&S 8.5 carb kit 798917 $46

I suggest that you check my post (#20) at https://www.snowblowerforum.com/forum...hen-wet-2.html

I have Craftsman 536.881850 with B&S motor 15A114-0342-E1

Seems the 50 and 51 are very similar machines.

I installed carb kit 798917 $46 from Appliance Parts | Replacement Water Filters | Lawn & Garden Repair Parts

I would not mess around with a carb rebuild at these prices.
Kit has new redesigned carb. Seems to try to address vapor lock (shorter fuel run) and carb moisture/icing at the same time. Guess even B&S doesn't have a good handle on it. Problem is that I haven't been able to test it under the 'ideal' failure conditions: Snowing or very moist/cold air. But the stupid plastic chute still dumps all kinds of snow over the engine, and the upgrade does seem to work.

I think the problem was carb icing . My neighbor has a 6.5HP which stalled when wet as well. Took hours of 'off time' for it run correctly. Had him blow a hairdryer on it for an hour (under a cloth cover). Came right back up and ran fine (because the snow had stopped by then )
Takes a long time for any kind of ice build up to recede, especially when the machine has to be left out in the cold. Vapor Lock condition would take only a few minutes to 'go away'.
Same kit is recommended for his 6.5, but he wants to wait until after snow season: it runs now, he cannot afford backlog at the small engine shop.


Good Luck.
02-06-2015 07:26 PM
cnbcook
Quote:
Originally Posted by timreefer View Post
Update for the craftsmen. Runs fine,operates fine. Rebuilt carb. Could not find anything at all wrong. Small engine shop suggested fuel starvation when auger creates extra load on motor.. So far he was right. Blew out fuel lines,cleaned tank, rebuilt carb. No issues.Attachment 32521

Attachment 32529
Hey Tim, did you rebuild the carb yourself? I'm not having luck finding a rebuild kit.

Also, I don't think mine looked that good new!
02-01-2015 12:50 PM
robdenuto
Quote:
Originally Posted by timreefer View Post
Update for the craftsmen. Runs fine,operates fine. Rebuilt carb. Could not find anything at all wrong. Small engine shop suggested fuel starvation when auger creates extra load on motor.. So far he was right. Blew out fuel lines,cleaned tank, rebuilt carb. No issues.Attachment 32521

Attachment 32529
I have the same unit, your machine looks brand new!
12-23-2014 08:23 PM
timreefer
craftsman 8.5/27

Quote:
Originally Posted by Big Ed View Post
The guy behind me bought a brand new pressure washer and it was doing the same thing. I told him to loosen the cap and see what happened. It ran fine, turned out the the brand new cap had some kind of flaw and didn't vent. They gave him a new, different cap for it. I guess they also had to give away a lot of caps to others who bought them?
Brand new, you would think your set for a while.
The shop asked me if the tiny vent was clogged in gas cap when I first picked it up. As of now starts 1St pull,runs fine,engage auger doesn't miss a beat. Throws snow ??? Close to 60 tomorrow .
12-23-2014 04:34 PM
Big Ed
Quote:
Originally Posted by HCBPH View Post
I don't know if this was the model or not but I remember some reference to air not getting into the gas tank and it essentially starved the engine for fuel.
Maybe try loosening the gascap and stick some tape on the side of the cap to the tank so it doesn't come off and try it. If it continues to work then that may be your issue.

Just a thought.
The guy behind me bought a brand new pressure washer and it was doing the same thing. I told him to loosen the cap and see what happened. It ran fine, turned out the the brand new cap had some kind of flaw and didn't vent. They gave him a new, different cap for it. I guess they also had to give away a lot of caps to others who bought them?
Brand new, you would think your set for a while.
12-23-2014 11:43 AM
HCBPH I don't know if this was the model or not but I remember some reference to air not getting into the gas tank and it essentially starved the engine for fuel.
Maybe try loosening the gascap and stick some tape on the side of the cap to the tank so it doesn't come off and try it. If it continues to work then that may be your issue.

Just a thought.
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