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post #1 of 17 Old 02-05-2019, 11:43 AM Thread Starter
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Runs like crap

Ok so I have a 10hp tecumseh that runs like crap. Sometimes it runs good other times it surges and runs like crap. Engine rebuilt last year new carb on it.

I'm think the throttle linkage might be gummed up. Making it hard for the governor to work properly.

What do you all think.

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post #2 of 17 Old 02-05-2019, 11:45 AM
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Originally Posted by bambamshere View Post
Ok so I have a 10hp tecumseh that runs like crap. Sometimes it runs good other times it surges and runs like crap. Engine rebuilt last year new carb on it.

I'm think the throttle linkage might be gummed up. Making it hard for the governor to work properly.

What do you all think.

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does the carb have the fixed nut on the bottom of the bowl or the adjustable jet?

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post #3 of 17 Old 02-05-2019, 11:49 AM
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New carb? Means nothing, get an adjustable carb #632334

1986 Ariens ST522, 5hp, 22"
1995 Murray Craftsman 10hp, 29" w. 12" impeller
A 1983 Real John Deere 10hp, 32" w. 12" impeller, 16" auger, 20" high front, cast iron gear box, chains
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post #4 of 17 Old 02-05-2019, 11:51 AM
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Probably bad gas. Drain the system and start again with fresh fuel. Preferably zero alcohol.
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post #5 of 17 Old 02-05-2019, 11:59 AM
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Yea, I agree with Dannoman, I jumped too fast. I always look at the gas first. Drain the carb and tank separately into 2 clear soda bottles, water will sink to the bottom, check for clarity and color.

1986 Ariens ST522, 5hp, 22"
1995 Murray Craftsman 10hp, 29" w. 12" impeller
A 1983 Real John Deere 10hp, 32" w. 12" impeller, 16" auger, 20" high front, cast iron gear box, chains
Noma 9hp, 27" w. 12" impeller
Noma 5hp, 24" w. 12" impeller, 20" high front
Gravely Convertible, 12hp Kohler cast iron, 26" width, 600 lbs of cast iron & steel, 2 speed impeller, 4 ground speeds
Dynamark 8hp, 26", 12" impeller, for sale
Several other 5hp, 8hp, several 2 cycle, all for sale
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post #6 of 17 Old 02-05-2019, 06:25 PM
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carb needs adjustment or intake leaks.
adjust low and high mixture screws, this is the most common fix.
use brake cleaner around intake pipe connections to find intake leaks

Bought a dead but now fixed 1980ish craftsman II 10/28....ITS ONE HEAVY BEAST

MY VIDS ON FIXIN HER UP

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post #7 of 17 Old 02-06-2019, 11:56 AM Thread Starter
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So I was looking at it yesterday and think that there is a hole different problem. I started it up and let it run for about 1/2 and well I went took the throttle and put to idle and the to fast idle it. When I did this blue smoke started coming out of exhaust.

Now when I did the engine last year the head gasket wasn't in the kit. I know also it could be the rings on piston. This is a 25 year old machine. That came from a farm and hadn't ran for about 5 to 10 years. Not sure how hard it is to replace rings. I know head gasket is simple but rings not sure.

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post #8 of 17 Old 02-06-2019, 12:17 PM
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Based on the history it could be any number of things, internal and external.

I'd start with a compression and leak-down test.

.

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post #9 of 17 Old 02-06-2019, 12:23 PM
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Quote:
Originally Posted by bambamshere View Post
Ok so I have a 10hp tecumseh that runs like crap. Sometimes it runs good other times it surges and runs like crap. Engine rebuilt last year new carb on it.

I'm think the throttle linkage might be gummed up. Making it hard for the governor to work properly.

What do you all think.

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Rebuilt... can you elaborate. Did you do it yourself?

Cold and hot compression numbers will be helpful.

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post #10 of 17 Old 02-06-2019, 02:44 PM Thread Starter
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Rebuilt... can you elaborate. Did you do it yourself?



Cold and hot compression numbers will be helpful.
I'm sorry what I should have said was I replaced all the gaskets because severe oil was leaking from everywhere on it. I know it still leaks from somewhere on it. Around the air cleaner. I have to wait for a bit to do compression test on it because it is been very cold out side lately. 5 days ago it was like -52*c here. Had it going 2 days ago blowing about 10cm of snow. Still works good just blowing blue smoke.

Anyways I will get the compression test done soon and report back. I did adjust the valves last year also.

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