Snowblower backfire on Choke outlet - Snowblower Forum : Snow Blower Forums
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post #1 of 34 Old 01-27-2020, 02:27 PM Thread Starter
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Snowblower backfire on Choke outlet

Hello All, I have been searching and doing little adjustments on this issues
I have a Toro ccr 6053 (38575) I got this unit fairly cheap. Old owner said they havent used it in over a year.
Perfect carb repair I thought

I have changed the spark plug, cleaned the carb x 4, put new gas in
The unit tries to start. I can see backfire on the outlet of the choke area. It never really started. While I crank it without fully pulling I can see fuel leaking out of the choke outlet as well.
Do I need a completely new carb? or am I looking at something deeper (valve, timing issues?)

Thanks
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post #2 of 34 Old 01-27-2020, 02:39 PM Thread Starter
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post #3 of 34 Old 01-27-2020, 02:56 PM
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hows the oil in it look? looks like a lot of gas coming out of the carb. i would maybe pull the valve cover and check the valves to make sure the valves are moving as they should and maybe check the valve lash while in there.

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post #4 of 34 Old 01-27-2020, 03:15 PM
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It sure looks like it's firing with the intake open.

I'd do as stated and pop the valve cover to see what's going on. From the IPL pricing, I would guess the cam is plastic.
https://www.partstree.com/models/oh1...ist-ohsk5xa-0/
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post #5 of 34 Old 01-27-2020, 03:20 PM
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Check for a critter nest in the exhaust

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post #6 of 34 Old 01-27-2020, 03:23 PM
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Welcome to SBF Raymond. Here is a link to the Tecumseh OHV service manual. I also would check the valve clearances and look for proper operation. Could be a bent push rod, bad cam shaft or hopefully, valves out of adjustment, which is .004 thousandths each valve. I think your OH195 motor is the same as an OHH-OHSK55-70 in the manual.


http://www.barrettsmallengine.com/ma...alvemanual.pdf

Toro 8/24 (38080) 1989
Toro 721-QZR (38743) 2015 (Hemi Predator Power)
Toro (51984) Hand Held Blower (For the light stuff)

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post #7 of 34 Old 01-27-2020, 03:45 PM Thread Starter
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thanks for the prompt reply guys. So getting a new carb wouldn't solve this? (looking for an easy way out). I spray started inside the engine and it still would start. Ill open it and see. how diff is this process? valve replacement and etc
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post #8 of 34 Old 01-27-2020, 04:52 PM
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Quote:
Originally Posted by Raymund Aguilar View Post
thanks for the prompt reply guys. So getting a new carb wouldn't solve this? (looking for an easy way out). I spray started inside the engine and it still would start. Ill open it and see. how diff is this process? valve replacement and etc
Before you go any further check for a critter nest in the exhaust..I pulled on a rope for three hours one time. ...the engine was doing the same thing as in your video.
The intake valve not fully closing can also cause the issue you are experiencing.
Not sure about your particular engine... But I have see spark plugs that were to long installed and a valve hit it upon opening.
A sheared flywheel key can throw your ignition timing way off(if its electronic)
If it has points it usually won't have a spark though.
A soft pull on the rope with the ignition off should tell you if the intake valve is not closing properly..very low compression and you can hear it coming back out of carb.
Also if the machine did not have an air filter ..a critter could have built on the intake side and a piece of debris can be on the valve not letting it close fully.




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post #9 of 34 Old 01-27-2020, 05:09 PM Thread Starter
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Thanks. I pulled it and the spring was loose. the washer that is holding the valve connected was off and sheared. I am hoping everything else is good if I replace that.
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post #10 of 34 Old 01-27-2020, 05:19 PM Thread Starter
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