Tecumseh used at least three, maybe more, different carbs on the H70 models. If you didn’t purchase your new carb using the correct spec number, you may have gotten the wrong carb for your engine. Can you give us the spec number off your engine and all numbers and info you have on the new carb you purchased. We might be able to see if you have the correct carb for your engine or which carb you need.
Tecumseh H70 When I rototill it will die and shoot out black smoke out of the muffler
- Thread starter Wikkyfolt
- Start date
I didn't adjust the points stuff, I meant the carb sorry, the one at the bottom of the float bowl and if that doesn't work then I'll focus on points. However, I can't get it to start after I adjusted the float bowl jet (I think that's the main jet) and I can't find the sweet spot I had it at, that is what I mean by it won't start now.
https://www.ebay.ca/itm/262759321160?ViewItem=&item=262759321160 Thats the carb I bought, I'll get the numbers on the engine tonight
bertsmobile1
Lawn Royalty
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Go back to the vendors ebay page and click on "See other items"
Then have a look at what turns up.
If all of his stuff is mower/engine related then there is a good chance he knows what he is selling and it has come from a reputable supplier as servicable items.
OTOH if he is selling everything from condomes to X-ray curtains then there is a 99% chance it will be junk because he is nothing more than a surplus reseller.
So it could be a simple over production or all the parts rejected as being defective.
Then have a look at what turns up.
If all of his stuff is mower/engine related then there is a good chance he knows what he is selling and it has come from a reputable supplier as servicable items.
OTOH if he is selling everything from condomes to X-ray curtains then there is a 99% chance it will be junk because he is nothing more than a surplus reseller.
So it could be a simple over production or all the parts rejected as being defective.
Got the numbers: H70-130215D 8ER-6147D 
Also on the bottom of the carb it has: Lauson-power product and two small numbers that's 50 Or 05 not quite sure what way its supposed to be read
Also on the bottom of the carb it has: Lauson-power product and two small numbers that's 50 Or 05 not quite sure what way its supposed to be readThe original carb for that engine is part number 631912, which is no longer available. When I look at the carb you purchased, it is not a direct substitute. I have tried to locate a carb for you, but have not found one I like. Couple of questions. When you replaced the carb, did you replaced the gasket between the carb and manifold, plus between the manifold and block? Wouldn’t be the first time gaskets look good, but leak. Also, with the new carb, did you go through the adjusting procedure I posted?
It came with a gasket, I attempted the adjustment procedure and miserably failed, lol, it won't even start now, so I need to know a working main jet adjustment so I can get it running at least and try it again, I'll look for the gasket by the block and the manifold, I didn't see if that one was good.
Fish
Lawn Pro
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Hello,
I've found some carbs aren't worth rebuilding (due to corrosion worn choke/throttle shafts etc). On eBay i did a search on "carburetor for a tecumseh H70 engine" and all sorts came up.
I replaced the carb on my troybilt tiller (4 hp) with a cheap eBay carb and it runs fine.
Regards
Jeff
I've found some carbs aren't worth rebuilding (due to corrosion worn choke/throttle shafts etc). On eBay i did a search on "carburetor for a tecumseh H70 engine" and all sorts came up.
I replaced the carb on my troybilt tiller (4 hp) with a cheap eBay carb and it runs fine.
Regards
Jeff