First fall startup - something isn't right - Snowblower Forum : Snow Blower Forums
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post #1 of 12 Old 11-11-2015, 10:41 AM Thread Starter
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First fall startup - something isn't right

First time poster. Thanks for having me! I have a 2000 30" Toro Powerthrow snowblower. Started it up last night for the first time this fall to do a test run in case we get something tonight. Anywho, it never quite ran to full power, and after a couple of minutes, sparks would occasionally come out the muffler/exhaust. I had changed the oil in it this spring before I put it away, and noticed last night that the oil level was 3/16" above the full mark. Might this be the cause? I had a tune up done last winter, btw. Any help is appreciated!
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post #2 of 12 Old 11-11-2015, 10:46 AM
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could be a carb or the exhaust valve is bad
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post #3 of 12 Old 11-11-2015, 10:48 AM
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Before the unit was put away in the spring was the fuel tank drained?

1989 John Deere 1032
1979 Toro 5/24 38040 (now a 6.5/24)
2015 Snapper Pro SW30 52" Mower
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post #4 of 12 Old 11-11-2015, 10:57 AM Thread Starter
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Yes, it was drained. Empty all summer.
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post #5 of 12 Old 11-11-2015, 11:41 AM
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Quote:
Originally Posted by Barracuda Snowblower View Post
Yes, it was drained. Empty all summer.
Hmm then we can rule out the carb being gummed up
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post #6 of 12 Old 11-11-2015, 12:21 PM Thread Starter
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I also had the carb cleaned out halfway thru last winter, and it didn't do it after that. I MAYBE used it a dozen times last winter, not much snow up here last year.
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post #7 of 12 Old 11-11-2015, 01:18 PM
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Quote:
Originally Posted by Barracuda Snowblower View Post
Yes, it was drained. Empty all summer.
OK

My guess is that there could be a piece of carbon or something lodged in between the exhaust valve and its seat (hence the sparks and low power). How is the compression when pull starting the engine? An official compression test should yield at least 80 psi is if all is ok. Is the engine a flat head Tecumseh?

But if this were my machine I would first "start anew" and...

1. Change the oil (how it got higher on its own is odd -was the machine stored outside in the weather?)
2. Clean/inspect the float bowl and main jet,
3. Verify proper float operation and fuel flow,
4. While performing #3, put the cap on the tank and verify that the vent in the cap is operational. Fuel should flow as if there's no cap on the tank.
5. If applicable, reset the mixture screw(s) to factory spec(s),
6. Change the spark plug,

Also, was brand new fuel was used for this first startup? If not, get some from a busy station, drain the carb and tank and test.

1989 John Deere 1032
1979 Toro 5/24 38040 (now a 6.5/24)
2015 Snapper Pro SW30 52" Mower

Last edited by tdipaul; 11-11-2015 at 01:57 PM.
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post #8 of 12 Old 11-11-2015, 01:37 PM
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Welcome to the forum Barracuda

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Make sure the windows are up before the snow plow goes by !!

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post #9 of 12 Old 11-11-2015, 02:01 PM Thread Starter
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Thanks for the tips! I will try them, but not until this weekend. I had changed the oil this spring and had added a bit to much, that's why there was a bit more. I am going to drain it down some and see if that might be it. Again, thanks!
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post #10 of 12 Old 11-11-2015, 02:32 PM
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Having a bit more than "Full" on the stick isn't going to cause a problem. If you do get it way overfull then the crankshaft can whip the oil into a froth which doesn't do the engine or the oil any good and will break down the oil very quickly but won't cause any running issues.

From what you're describing it's likely valves or fuel.

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