Toro 2 Cycle CCR3650 -Surging - Snowblower Forum : Snow Blower Forums
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post #1 of 13 Old 02-12-2017, 04:10 PM Thread Starter
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Toro 2 Cycle CCR3650 -Surging

I had a no start condition on this snow blower so I cleaned the carb. It had the typical junk in the bowl but not terrible.

It is a plastic carb. as shown in this link.

Disassembly, Cleaning and Repair of Briggs and Stratton/Toro/Lawn-Boy 2-Cycle Plastic Carburetor

It does not have an idle circuit as it runs only at full bore.

After cleaning and putting it together I was able to get it to start but it is now surging.

The gaskets all looked good and I was able to clean the emulsion tube and main jet ok. I Used a wire and was able to pass it though all of the holes.

I used brake cleaner on the plastic as I was advised to not use carb cleaner.
I threw out the old fuel and started fresh with True Fuel to rule out any fuel questions.

In the link is says the plastic carbs are known to not seal well so I made sure it bolted up tight to the engine.

Can I use a gasket maker with or in place of the rubber gasket?

Any thoughts?

PS

A new replacement carb is metal, but $100+ USD.

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Last edited by Toro-8-2-4; 02-12-2017 at 04:41 PM. Reason: more info
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post #2 of 13 Old 02-12-2017, 05:52 PM
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I plan on getting the metal carb for my 2450 and calling it a day. after about 15 years the plastic carb started surging, the machine is 17 years old now

current machines
1-toro2450E-38419. 1-toro3000E-38435. 1-toro 3650E-38445
2-toro 521E-38052. 1-toro xl824pt 38086
1-.............,TORO XL 624ps..............
1-............, TORO XL 824ps..............
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post #3 of 13 Old 02-12-2017, 06:16 PM Thread Starter
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I am an idiot. It does have an idle circuit that was hidden behind a decal. I just assumed it does not since it only runs on full speed. I am not afraid to admit I make stupid assumptions.
I will take it apart again and give it a good complete cleaning this time. Not sure if it will help but i will certainly give it a shot. I will play around with the torque on the mounting bolts. I have a feeling an air leak is the problem. Sounds like Detdrbuzzard has similar issues.

Still interested in thoughts around using gasket maker, permatex etc.

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post #4 of 13 Old 02-15-2017, 05:51 PM Thread Starter
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I want to bump this thread to see if anyone has an experience or opinion on using gasket maker between the plastic carb and the intake. For some reason I think I recall hearing not to do that for some reason I can't recall. Or I just may be loosing my marbles?
Thanks.

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post #5 of 13 Old 02-15-2017, 07:51 PM
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DON't....I'm not familiar with that exact machine, but 'Gasket Maker' is a Kiss of Death. Does it have an O-Ring gasket on the plastic Flange of the carb?? If so. I would make a paper gasket, out of the thickest of the materials. But I find that the plastic bec omres porous and will suck air THRU the body. Try spraying around the carb with brake cleaner and the straw..... If it smooths out, theres the leak. But use the straw to keep it away from the inlet, as it will speed up anyway. Using propane is even better, as it's heavier than brake cleaner and easier to pinpoint leaks.

GLuck, Jay
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post #6 of 13 Old 02-15-2017, 09:14 PM
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I'm going with a metal carb because if you've nicked that plastic carb while cleaning it could cause a problem, too bad toro didn't have the engine make put a metal carb on to start with

current machines
1-toro2450E-38419. 1-toro3000E-38435. 1-toro 3650E-38445
2-toro 521E-38052. 1-toro xl824pt 38086
1-.............,TORO XL 624ps..............
1-............, TORO XL 824ps..............
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post #7 of 13 Old 02-15-2017, 09:42 PM Thread Starter
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Jay, the gasket is a thin rubber gasket. There is a heat shield between the carb and the intake and both sides have the same rubber gasket.

Just curious, why is gasket maker the kiss of death.?

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post #8 of 13 Old 02-18-2017, 10:54 AM Thread Starter
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After the 2nd cleaning it is still surging.

I played around with the mounting bolt torque and it did not seem to really matter. of course when they got really loose it did. I sprayed some break clean around it and around the mating surfaces. It did not seem to change anything. This leads me to think it is an internal carb issue.

I am just thinking, has anyone every used an ultrasonic cleaner on a plastic carb.? I would use a gentle solution like simply green or even dish soap like Joy, with the heat turned off.

Just thinking out load. Heck, I can get a cheap ultra sonic cleaner at HF for a lot less than $100 and have it for other carb and small parts cleaning projects.

Any thoughts on this out there?

Current machines
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Yard Machine 22" upgraded with 6.5 HP Predator

Last edited by Toro-8-2-4; 02-18-2017 at 11:02 AM.
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post #9 of 13 Old 02-18-2017, 03:20 PM
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Quote:
Originally Posted by Toro-8-2-4 View Post
I am just thinking, has anyone every used an ultrasonic cleaner on a plastic carb.? I would use a gentle solution like simply green or even dish soap like Joy, with the heat turned off.

Just thinking out load. Heck, I can get a cheap ultra sonic cleaner at HF for a lot less than $100 and have it for other carb and small parts cleaning projects.

Any thoughts on this out there?
I haven't tried an ultrasonic cleaner on a plastic carb, sorry. But it's been great on the metal carbs that I've cleaned so far. I use Simple Green HD as a cleaning solution. I didn't do any mechanical cleaning to the carbs first, just disassembled, dropped them in the heated solution, and ran them for about an hour.

I was going to buy a replacement carb for my surging generator for $40 (rebuild kits are not available for it). Then I decided to get an ultrasonic cleaner instead, figuring it would let me clean a bunch of things, even besides carbs. I think it will save me money over time, and it can be a really handy tool to have around.

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post #10 of 13 Old 02-19-2017, 10:20 AM Thread Starter
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Quote:
Originally Posted by RedOctobyr View Post
I haven't tried an ultrasonic cleaner on a plastic carb, sorry. But it's been great on the metal carbs that I've cleaned so far. I use Simple Green HD as a cleaning solution. I didn't do any mechanical cleaning to the carbs first, just disassembled, dropped them in the heated solution, and ran them for about an hour.

I was going to buy a replacement carb for my surging generator for $40 (rebuild kits are not available for it). Then I decided to get an ultrasonic cleaner instead, figuring it would let me clean a bunch of things, even besides carbs. I think it will save me money over time, and it can be a really handy tool to have around.
Thanks for that feedback. I am thinking I would run it with out the heat and see what happens. First I need to acquire a unit.

Current machines
Ariens 926LE

Yard Machine 22" upgraded with 6.5 HP Predator
Toro-8-2-4 is online now  
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