Techumseh HSSK50 is hard to start and keep running - Snowblower Forum : Snow Blower Forums
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post #1 of 30 Old 04-25-2018, 12:59 PM Thread Starter
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Techumseh HSSK50 is hard to start and keep running

I'm working on a murray with a Techumseh HSSK50 which had been stored outside in the weather for years. I replaced the rusted out carb and it will run if i use the electric starter and hold it for about 20 seconds then it will run and sound good for about 5-10 seconds before it fades out and dies. I replaced the coil and spark plug as well and it still does the same thing. One time i got it to run for 5 minutes and i took it up and down the driveway. I shut it off and it would not start again without the electric starter and it would die again after a few seconds. I'm wondering if it could be the valves? I've never opened one of these up and I'm out of ideas. Any assistance is appreciated.
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post #2 of 30 Old 04-25-2018, 01:06 PM
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before going too much farther have you checked/clean the fuel system. possibly replaced the main supply line. i know sometimes the fuel lines collapse or clog with age.

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post #3 of 30 Old 04-25-2018, 01:23 PM Thread Starter
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Quote:
Originally Posted by crazzywolfie View Post
before going too much farther have you checked/clean the fuel system. possibly replaced the main supply line. i know sometimes the fuel lines collapse or clog with age.
Yea, the fuel line flows very well and is in good shape. I've popped it off the carb a couple of times and it will flow out nicely. I'm going to replace the primer line next but i doubt that will have much of an effect.
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post #4 of 30 Old 04-25-2018, 05:09 PM
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if it has points and a condenser you might want to check them

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post #5 of 30 Old 04-25-2018, 05:13 PM Thread Starter
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[QUOTE=detdrbuzzard;1583514]if it has points and a condenser you might want to check them[/QUOTE

no points, it has the solid state coil. I believe it is from the early 2000's
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post #6 of 30 Old 04-25-2018, 05:26 PM
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low compression would cause a hard-start issue; Valve lash &/or head gasket are the usual culprits... less frequently it's the cylinder walls / piston rings.

Do you feel much resistance when you slowly pull it over?


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post #7 of 30 Old 04-25-2018, 05:28 PM
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The carb was replaced with what, exactly? Offshore parts can have QC issues . . . . might have gotten a bad or misaadjusted one . . . and not sure how the old one could 'rust out' considering that they are not steel or iron based . . . Did you consider cleaning the old one, or even open it and look? Might be an option, at least to test . . .

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post #8 of 30 Old 04-25-2018, 06:01 PM Thread Starter
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Quote:
Originally Posted by classiccat View Post
low compression would cause a hard-start issue; Valve lash &/or head gasket are the usual culprits... less frequently it's the cylinder walls / piston rings.

Do you feel much resistance when you slowly pull it over?
The resistance feels about the same as any other similar sized snow blower, not unusually hard to pull.
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post #9 of 30 Old 04-25-2018, 07:48 PM
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Tecumseh motors are so temperamental, especially the carburetors..If rebuilding the carburetor wont work, best bet is to replace the carb with an OEM carb, but check the valves and cylinder first before you invest in the carburetor..
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post #10 of 30 Old 04-25-2018, 07:58 PM
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Highly don't think the carb would be doing that, OEM carb will cost a fortune and the chinese carbs are pretty good, I have yet to get a bad one and I have used them a LOT. With the compression, These engines have a compression release for starting so until it fires and the rpm starts coming up they ALL have lower compression. Go to a auto zone or the likes they have tools they let you use and get a compression tester and use the electric start to test it to get the rpm high enough to stop the compression release. If it has low compression then that will tell you and odds are it is a valve or head gasket.

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