No longer starts on first pull

B

Bean438

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• Mar 24, 2019 / No longer starts on first pull

• #1

My mower used to,start on one pull. It no longer does. Usually takes about 5-6 pulls. If it’s been running a while, it starts one pull.

What can I do to get a one pull start again?

There’s no choke, and no throttle.

Thanks.

 

R

Rivets

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• Mar 24, 2019 / No longer starts on first pull

• #2

Willing to bet that the float seat has swelled up changing, lowering, the level of fuel in the carb bowl. Simple fix, need to clean and rebuild carb with kit number 631021B. If you need instructions post back with the numbers off the engine and I will tell you how I rebuild these carbs all sommer long. Have already done a half dozen this year and we still have snow on the ground.

 

B

Bean438

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• Mar 24, 2019 / No longer starts on first pull

• #3

I’m at work right now and will post back with the engine numbers.

As for the rebuild kit, can I safely order the one you listed? Are the carbs the same for all Tecumseh mowers?

Would it be worthwhile just replacing the carb?

 

Fish

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• Mar 24, 2019 / No longer starts on first pull

• #4

Hard to say without knowing what you have. But the carb is likely full of crud, and needs a good cleaning.
Post you engine's numbers. Might be able to just pull off the bowl nut, let some crud dribble out, and clean the orifices in the nut.
And re-assemble...

 

B

Bean438

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• Mar 24, 2019 / No longer starts on first pull

• #5

Actually last spring I dropped the bowl, cleaned it out, and sprayed carb cleaner underneath. I did this because I forgot to drain the fuel for storage.

Anyways it still started but just not on the first pull. It’s been like that for at least 5 years now.

 

R

Rivets

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• Mar 24, 2019 / No longer starts on first pull

• #6

Once I have the numbers I’ll be able to double check the kit. 95% of the Tecumseh carbs on mowers use the kit I posted. Cost is about $5.00.

 

Fish

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• Mar 24, 2019 / No longer starts on first pull

• #7

Just again,
pull the bottom nut/jet, clean out all of the tiny holes in it, let all of that bad fuel drain out.

Put the nut back in and try to start.

 

Fish

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• Mar 24, 2019 / No longer starts on first pull

• #8

Fish said:

Just again,
pull the bottom nut/jet, clean out all of the tiny holes in it, let all of that bad fuel drain out.

Put the nut back in and try to start.

Click to expand...

Well, after re-filling with fresh fuel.....

 

B

Bean438

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• Mar 24, 2019 / No longer starts on first pull

• #9

Fish said:

Just again,
pull the bottom nut/jet, clean out all of the tiny holes in it, let all of that bad fuel drain out.

Put the nut back in and try to start.

Click to expand...

Did that. Still takes a few pulls.

 

B

Bean438

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• Mar 24, 2019 / No longer starts on first pull

• #10

Ok, mower model number is 944.369450 and engine number is 143.996006.

So would I just need the “kit” you suggested?

What about o rings “632547”? I saw a guy replace two of those in some kind of tube that he popped out of a carb. It was from the emulsion tube. They are 4 bucks each.