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Tecumseh Carb Rebuild.....


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#1 hamman ONLINE  

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Posted November 28, 2014 - 06:25 PM

Hope I spelled that right? Oh well, I have a Coleman power mate 8 hp generator that we have had for about 10 years. My uncle had it for his HVAC business and someone forgot to check the oil and they blew it up. I partnered with my BIL to buy a short block and got it running about 6 years ago. We used it at our Bear Camp a few times until he got a diesel generator to use from a friend and then he inherited a nice generator from my father in law. We use that most of the time at camp now. We used to have problems with power outages in the winter over the past. They have since upgraded the power grid and now they are not as frequent. It has always been hard to start, but it would run after some coaxing. I pulled it out from under the bench the other day tried to get it running with no luck. It has always had a short pull rope on it (30"0 and that makes it hard to start but the thing pulls over very hard. I pulled the carb and was surprised when the first thing happened, the high speed brass needle holder broke off in the carb. My camera is acting up again and I couldn't get any pictures. This was the worst carb I have ever worked on. The float was coated in a thick black gunk. There was a bunch of rust also in it. It was stuck and would not move at all. I had to drive the pin that holds the float out with a punch. Had to pull the needle and seat out with long nose pliers. Once I got it apart I had to use an easy out to get the rest of the brass fitting out. Luckily ti came out without any damage to the carb. I used carb cleaner to spray the carb and it cleaned up pretty good. I also put some Seafoam in it and that helped. Cleaning the float without damaging it was a challenge but with the help of CC and Vinegar I got it all cleaned. Bought a rebuild kit at the local NAPA and put it all back together and now ready to put it back on to see if it runs now. We will also be putting a 48" pull rope back on it so it won't be such a short pull. I will let you know how it turns out.

A question I have and haven't found an answer to is, are there electric starters avaible for these? Model is a HM80. I can't see any teeth on the fly wheel so I would guess it would have to changed as well. Thanks for listening and any information.

Roger.

 


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#2 drbish ONLINE  

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Posted November 28, 2014 - 07:27 PM

I could not find  a 12 volt starter on any parts list,just an 110 volt.I would think if they made a 110 volt you could find a 12 volt.

here is where i looked

http://www.tecumsehp...fLm7Aod72cAmw# 

 I do have a flywheel and a starter off of a hh60


Edited by drbish, November 28, 2014 - 07:29 PM.

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#3 hamman ONLINE  

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Posted November 28, 2014 - 07:40 PM

I've been looking and came across a 12 V starter for it. I also saw a flywheel both on ebay. I wasn't sure that those parts were still available. About $ 100 for both with no shipping.  Have to think about that for a bit.   Thanks for looking. I have bookmarked that site in case the carb doesn't work.                 Roger. 


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#4 tater195 ONLINE  

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Posted November 28, 2014 - 07:47 PM

If It didnt come with an electric starter, you will need to change the stator also, unless you dont mind keeping a battery charger on it.

The 48" pull rope might be kinda tough. It will take a smaller diameter rope to get 48" on the pulley and that will break easier


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#5 IamSherwood OFFLINE  

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Posted November 28, 2014 - 07:49 PM

I might be wrong here, but check the crankshaft #'s, and make sure that flywheel

will fit yours. I seem to remember something about that. Could be wrong though.


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#6 MH81 ONLINE  

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Posted November 28, 2014 - 07:53 PM

The 8's are a hard start. They did make electric start for them (the MF8 had a starter) but they also made a 110 starter for the versions on the snowblowers.

I have an 8 on a log splitter that is a bear to start, one thing that did help was to solder all the EPA approved holes shut on the choke plate.

Oh, yeah... What Will said too. Verify they will work.
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#7 tater195 ONLINE  

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Posted November 28, 2014 - 07:59 PM

I'm kinda foggy on this one , but was it the tec's or briggs that had the wind up starter? Change out the pull start for a wind up (if tec made one) , less parts to swap out. I'm not sure they will kick it any faster as I have only seen them on a push mower


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#8 hamman ONLINE  

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Posted November 28, 2014 - 08:14 PM

I had a Briggs walk behind mower with a wind up. Don't know if Tec had them. If 30" is to short and 48" is to much should I go wit 40" then? As I get older it's really hard to start it. I think I will try the choke plate trick. Thanks for the help.                                                                                                                     Roger



#9 tater195 ONLINE  

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Posted November 28, 2014 - 08:17 PM

Just incase the thought crosses your mind, dont use an impact wrench on the flywheel nut. I tried that 25 years ago, it didnt turn out so well


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#10 superaben OFFLINE  

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Posted November 28, 2014 - 08:38 PM

Roger, a couple thoughts.

 

First.  I have pieces off a long since scrapped salvage electric start HM80 tucked away.  There was a good electric start flywheel and starter.  I don't know if it is 110 or 12 volt.  I forget. 

 

Second.  New carburetors for an HM80 are not expensive.  They are available aftermarket.  If this one frustrates you too much, I can get you a heck of a deal on a new one.  The old Tecumsehs are very reliable and (if you have an adjustable carburetor) should start on the first pull everytime. 

 

Third.  As a historical note, Tecumsehs were offered with a wind up "impulse starter" like Briggs did.   I have one NOS kit. 

 

Ben W.


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#11 drbish ONLINE  

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Posted November 28, 2014 - 09:00 PM

Here is a tec with an impulse starter that i have.

002.JPG  

005.JPG

006.JPG


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#12 boyscout862 ONLINE  

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Posted November 29, 2014 - 08:46 AM

The gunk in the carb was "varnish" because the engine was left with gas in it for a long time. It may still be hard to start because of  varnish in the very small ports in the carb. Once you get it running right, always run it out of fuel and turn the engine until you feel compression. I always add Marvel Mystery Oil to the gas to coat the fuel system and prevent corrosion. Good Luck, Rick


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#13 superaben OFFLINE  

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Posted November 29, 2014 - 08:55 AM

Here is a tec with an impulse starter that i have.

attachicon.gif002.JPG

attachicon.gif005.JPG

attachicon.gif006.JPG

 

I forgot you had that little thing, Don.  Is that a camshaft driven shaft out the rear or a mounting stud?

 

Ben W.


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#14 hamman ONLINE  

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Posted November 29, 2014 - 09:26 AM

When I put the generator away we ran Stabil through it. I thought it had gotten in to it al right. I must admit that all those years ago I did not bring it out and start it again. My Bad as they say. The float bowl was varnished up quite a bit. The float was covered in a black sticky gunk. I've cleaned a lot of carbs and this one was the worst one I've created. Once I get it working right I will take your advice Rick and run it out of fuel. Ben I will Message you reference  the carb and starter. I am going to try to get the camera to work to show a couple of pics in a bit.  Thanks guys.                                                                                         Roger.


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#15 hamman ONLINE  

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Posted November 29, 2014 - 09:28 AM

Well for some reason I can't Thank some of your posts. Don't understand it but know I thank each of ya that respond.   THANKS !                              Roger.


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