Hand Crank vs Electric Start. Why doesn't it always turn manually? - Snowblower Forum : Snow Blower Forums
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post #1 of 21 Old 01-07-2020, 12:52 PM Thread Starter
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Hand Crank vs Electric Start. Why doesn't it always turn manually?

Most of the time my old Tecumseh starts no problem with one or two pulls. But on colder days - or days it has not been in service for a while - I sometimes need to resort to using the electric starter. This might be a silly question but why is that?
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post #2 of 21 Old 01-07-2020, 01:05 PM
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Expansion/contraction of metal of the carb or gas changing in cold


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post #3 of 21 Old 01-07-2020, 01:10 PM
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All my 5 gal. gas cans immediately get Stabil and half the rate of SeaFoam.

Also, these small engines should be using a Full Synthetic 5W30 motor oil.

My machines start fine in cold or warm weather.

Note also, use the primer and choke properly.

You could also have many other issues, i.e., bad plug, bad wire, clogged fuel line, etc., etc....
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post #4 of 21 Old 01-07-2020, 01:45 PM
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yeah i'm assuming either its a gasoline problem, or a carb problem since it does run fine once started. So clean your carb and make sure you use a fuel additive.
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post #5 of 21 Old 01-07-2020, 03:00 PM
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How old of a Tech ? Does it have a primer bulb and have you checked to see if maybe the primer line has deteriorated ? Usually starts to disintegrate at the carb. The fuel breaks the rubber down.


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post #6 of 21 Old 01-07-2020, 05:22 PM
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The old Tecs I had didn't have a bulb primer - they had that push button and plate system, which, while it worked, basically was a PITA. That, and the old Tec recoil starters were plastic, and broke if you looked at them funny . . . So yes, the electric will do better simply because it moves more air and can pull more charge in to get things going more quickly - and I don't think any amount of cleaning or tuning can alter that - you just plain can't keep it spinning (or at the same speed) with the recoil as the electric.



What we were told years ago (and has never failed me) on these old L heads is to go to full throttle, switch on (if you have one), choke *OFF*, hit the electric starter, and then with it running, flip the choke to full until it fires, and immediately back it off a position or two. Started every time in 1 to 2 seconds, no matter the temp, and reduces the risk of flooding vs. starting with full choke.



So, in my experience, I call it normal . . . .
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post #7 of 21 Old 01-07-2020, 05:24 PM
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Quote:
Originally Posted by Kiss4aFrog View Post
How old of a Tech ? Does it have a primer bulb and have you checked to see if maybe the primer line has deteriorated ? Usually starts to disintegrate at the carb. The fuel breaks the rubber down.

https://www.youtube.com/watch?v=UQnxze7Hnhg
Amazing how much easier they start when that primer bulb is in working order. DonBoy never ceases to amaze me at how thorough he is.

1996 MTD 5/22
2016 Toro 721 QZR
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post #8 of 21 Old 01-07-2020, 05:31 PM
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I drill a hole in my carb cover just in front of the carb...big enough to put a straw from a carb cleaner can. ( no electric in my shed). half choke,,,,one squirt....pull the recoil....fire in the hole!....why work hard????
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post #9 of 21 Old 01-07-2020, 06:12 PM
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Quote:
Originally Posted by Dannoman View Post
Most of the time my old Tecumseh starts no problem with one or two pulls. But on colder days - or days it has not been in service for a while - I sometimes need to resort to using the electric starter. This might be a silly question but why is that?
I have a hard time starting any of my 8hp snowblowers when the motor is cold but it is me and not the machine, most times I can't get the motor turning fast enough using the recoil and have to use the electric start. once the engine is warm it gets a little easier to use the recoil to start the engine

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post #10 of 21 Old 01-07-2020, 07:37 PM
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Quote:
Originally Posted by detdrbuzzard View Post
I have a hard time starting any of my 8hp snowblowers when the motor is cold but it is me and not the machine, most times I can't get the motor turning fast enough using the recoil and have to use the electric start. once the engine is warm it gets a little easier to use the recoil to start the engine
Same here. That's why I spend the extra couple bucks for synthetic oil. Seems when it's well below zero it helps to let the engine turn over faster. Easier on the arm
I rarely use the electric start but when you're worn out and looking at a driveway full of snow it's sure nice to have.

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