regular gas in a 2 stroke woes - Snowblower Forum : Snow Blower Forums
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post #1 of 49 Old 01-17-2019, 07:35 PM Thread Starter
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regular gas in a 2 stroke woes

Hi all
I just got a Toro CCR 3650 from a friend in non running. First thing I did was roll it over with the pull starter. Felt good. No start, not surprised, so I looked in the fuel tank and it had plenty of fuel. Almost clear fuel. Well s*&$. So I drained all the fuel out, drained fuel bowl, added correct premix, squirted a little oil down the carb to get things lubed up.
Still have a no start situation. Compression is at 90 psi. Has spark.
Removed the carb to look at piston and I do see some scoring on the piston.


So my question is should I just scrap this engine or is there still hope?


I was hoping to get it running and sell for about $135-$145 , Don't want the cost of parts to eat up the profits so I am working for free.
Thanks, Randy
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post #2 of 49 Old 01-17-2019, 07:44 PM
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Did you squirt starting fluid in the carb? Check for spark? Sometimes there is no spark because there is a ground.

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post #3 of 49 Old 01-17-2019, 07:54 PM
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He said it has spark, but I would second the suggestion of using some starting fluid, or spraying some gas into the carb's throat, to see if will run briefly. At least that would tell you if it's a carb problem.

I would expect that you'd have enough to get it to start with 90 psi, but I could be wrong. My 4-strokes fire with significantly less than that, which is what I'm using as a reference point.

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post #4 of 49 Old 01-17-2019, 07:59 PM
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Originally Posted by JLawrence08648 View Post
Did you squirt starting fluid in the carb? Check for spark? Sometimes there is no spark because there is a ground.
Yea make sure it will pop a little with starting fluid. 90psi is right on the fence on if it will run.

The gas could have fried the rings enough to make it not start. If it's not a gas or spark issue it probably isnt worth fixing.



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post #5 of 49 Old 01-17-2019, 08:11 PM
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I would pull the plug make sure the choke is open and pull starter rope and see if you get a lot of gas vapor , keep doing that even with the plug attached on the plug wire so you can watch spark as you do. Does your plug appear wet when you looked at it..

I have had 2 strokes flood over through carb / and put a lot of fuel in the lower end that made it a bear to get started, as it was picking up excess from the bottom end. Not sure on the toro models but look and see if it has a lower end drain plug on the case.
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post #6 of 49 Old 01-17-2019, 08:49 PM Thread Starter
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Tried starting fluid no go.
Using electric start and starting fluid it is trying to do something as I would get a little smoke, but no pop or spit n sputter.
I to have had 4 strokers run on less psi.


BTW that was some fast replies thanks

Last edited by Ran440; 01-17-2019 at 08:52 PM.
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post #7 of 49 Old 01-17-2019, 10:23 PM
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I work on a lot of 2 strokes. If you squirted oil in there and only got 90psi, it's done. Scoring smears the ringland enough to not let the rings spring out against the cylinder wall. 90psi is on the edge without the squirt of oil. With the oil should have been at least 130psi.
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post #8 of 49 Old 01-17-2019, 10:52 PM
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Plastic Carb?
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post #9 of 49 Old 01-17-2019, 11:48 PM
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idk where i work we pull the muffler and check for scoring if you have scoring you can still have compression yet still not be able to run properly. thats why first thing for every non running 2 stroke we service is pull muffler check cylinder walls and test compression. typically anything over 110psi is considered acceptable where i work but any 2 stroke with heavy scoring is typically wrote up as nwf unless its almost new
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post #10 of 49 Old 01-18-2019, 01:02 AM
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never ever spray starting fluid into a 2 stroke, ether wipes off the small amount of the oil in the mix off the piston , cylinder and needle bearings. causing scoring from being dry, the correct method is using a gas oil mix in a squeeze bottle or old fashioned oiler can if the motor needs to be primed .

i'm with arienskids pull the muffler take a good look at the piston, if it's scored, it's done, short block time
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