H30 engine rebuild questions
- Thread starter ssuper_nova_71
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The local small engine repair guy fixes edgers and mowers for Herb Homeowner. For Herb's purposes, it isn't fiscally sensible to rebuild an old H30 so he can edge his lawn four or five times a year.
You, on the other hand, by virtue of posting on OldMiniBikes, must dig old engines and old bikes. The satisfaction of firing her up after YOU have rebuilt her will be immeasurable. Parts are available - here, there and everywhere. Thousands of manuals out there, too, even on CD. Take your time. Study. Ask questions. Invest a few dollars in the tools you'll need.
Lesser men than you have rebuilt H30s. Why, I'm even doing one myself.
No try. Do.
furyus
You, on the other hand, by virtue of posting on OldMiniBikes, must dig old engines and old bikes. The satisfaction of firing her up after YOU have rebuilt her will be immeasurable. Parts are available - here, there and everywhere. Thousands of manuals out there, too, even on CD. Take your time. Study. Ask questions. Invest a few dollars in the tools you'll need.
Lesser men than you have rebuilt H30s. Why, I'm even doing one myself.
No try. Do.
furyus
Parts are out there, I get a lot of the older Tecumseh minibike stuff from Brandt with Rupp parts, Because I run into the same problem dealing with the local small engine shops when it comes to the older Tecumseh stuff. They can't find shit with out parts numbers, model, serial numbers, And the do not think outside the box. A lot of these engine are missing that that info when you pick them up. Brandt seem to know right away what you need after a couple of question about your engine. Not a lot of places left like that.
Brandt has rebuild instructions for the carbs. Hayne's Small Engine Repair manual is very good reading. It has all the specs needed for your engine and many many others. Illustrated guide to assembly, inspection, replacement, tuneup, etc. Talks about needed shop tools. Really great book IMO. You can rebuild your engine with that book alone (except for full valve job).
I just bought a 1972 Tecumseh "Mechanics Manual" off ebay for $14 shipped. Big ol' three ring binder with at minimum some good reference material. Like to pick up a Tecumseh/Lauson parts book, too, but so far sellers are asking big bucks for them. I'll stumble on one for less one of these days. Sounds like I should stumble on the Haynes as well.
furyus
furyus
Here is a link to Tecumseh's "Technician's handbook". It covers 3 to 11 hp L head motors.
http://www.cpdonline.com/692509.pdf
http://www.cpdonline.com/692509.pdf
That "Technician's Handbook" is great! Thanks for the link. I have an old Sears Craftsman Reserve Power 3.0 hp motor (it's a Tecumseh H30, I think.) It has the diaphragm carburetor setup and I've had a tough time getting it to idle. The local Sears store sells carb rebuild kits, but even after rebuilding the carb, it still just won't idle. Any suggestions that y'all know that might help with this particular engine? I have a doodlebug minibike that I want to put this motor on, but need to get it to idle before I do. Thanks.
Mike
Mike
That "Technician's Handbook" is great! Thanks for the link. I have an old Sears Craftsman Reserve Power 3.0 hp motor (it's a Tecumseh H30, I think.) It has the diaphragm carburetor setup and I've had a tough time getting it to idle. The local Sears store sells carb rebuild kits, but even after rebuilding the carb, it still just won't idle. Any suggestions that y'all know that might help with this particular engine? I have a doodlebug minibike that I want to put this motor on, but need to get it to idle before I do. Thanks.
Mike
Mike
Let me know if soaking it in alcohol works. I don't have access to an ultrasonic cleaner, but would be interested in knowing if that works for you. I like this little engine, and am hoping to get it tuned so I can get the minibike going for the grandkids. I have another doodlebug that has a 6.5 hp clone engine, and it runs really good, but need this second one to be put into service - I have several grandkids that are ready to learn to ride!!:thumbsup:
Ok so I have an update, I took the carb apart and soaked it in paint thinner...
also I found what I think was the problem all along. the brass fitting that holds the float bowl on, the one the main jet screws into. there are some holes in that brass fitting. a larger one toward the bottom and a very small one towards the top. the small one is like a pin hole. Well mine was clogged. I had to use a piece of wire from my wire brush to to clean out the hole... after I did that and put it back together.. ( the carb soaked for 15 minutes in thinner) it worked.. it finally idled down low..... now I have to fix that stupid governor linkage......
also I am about 1.5 turns open on the main jet and about 3/4 turns open on the idle mixture jet. I am going to try to readjust the governor tonight....
Aaron
also I found what I think was the problem all along. the brass fitting that holds the float bowl on, the one the main jet screws into. there are some holes in that brass fitting. a larger one toward the bottom and a very small one towards the top. the small one is like a pin hole. Well mine was clogged. I had to use a piece of wire from my wire brush to to clean out the hole... after I did that and put it back together.. ( the carb soaked for 15 minutes in thinner) it worked.. it finally idled down low..... now I have to fix that stupid governor linkage......
also I am about 1.5 turns open on the main jet and about 3/4 turns open on the idle mixture jet. I am going to try to readjust the governor tonight....
Aaron
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