Generators and Electric Motors
[Home] - [HELP] - [Forums] - [Groups] - [Classified Ads] - [Subscribe] - [Books] - [Sponsors] -

Go Back   SmokStak > SmokStak® Shop Equipment Tools and Techniques > Welding Shop
Forgot Password? Join Us!

Notices

Welding Shop Welder generators, equipment, weld practice, techniques, troubles and solutions. See our TERMS of SERVICE prior to reading!

Welding Shop

Miller Bluestar Tecumseh OH160 Won't Start


this thread has 11 replies and has been viewed 475 times

Reply
 
Thread Tools Display Modes
  #1  
Old 06-18-2019, 03:53:07 PM
bugle bugle is offline
Registered
 
Join Date: Sep 2009
Location: Missoula, Montana
Posts: 59
Thanks: 69
Thanked 8 Times in 8 Posts
Default Miller Bluestar Tecumseh OH160 Won't Start

Tecumseh OH160 170079A won't start. It has good spark, compression and fuel. Spins over fine. Even tried starting fluid but can't get so much as a "pop" out of it.
This is my first Tecumseh, every other engine I worked on would start or at least sputter or backfire if it had fuel, spark and compression.

OK, here is the long story. This is a Miller Bluestar 2E I did a valve job a couple months ago. It ran and welded fine then one day it quit and I found the throttle shaft had broke in half. I replaced it and the plate, and it hasn't started since. First it had a vey weak spark. I cleaned and adjusted the ignition gap to .010 and replaced the spark plug, gapped at .030, now it has a hot spark.
Reply With Quote
  #2  
Old 06-18-2019, 04:30:11 PM
Andrew Mackey Andrew Mackey is offline
Moderator
 
Join Date: Nov 2004
Location: Rockaway, New Jersey USA
Posts: 14,145
Thanks: 1,991
Thanked 6,766 Times in 4,300 Posts
Default Re: Miller Bluestar Tecumseh OH160 Won't Start

Point gap is supposed to be .020! Set at 10, spark may be too late. Check your plug. Is it wet with fuel? If so, toss it, crank the engine over a few times with the coil wire grounded, and clear out the combustion chamber. Install a new plug. crap gas they make now days shorts under compression. You will have spark out of the engine but under pressure, the plug will short out.
Reply With Quote
The Following User Says Thank You to Andrew Mackey For This Post:
  #3  
Old 06-18-2019, 04:58:41 PM
bugle bugle is offline
Registered
 
Join Date: Sep 2009
Location: Missoula, Montana
Posts: 59
Thanks: 69
Thanked 8 Times in 8 Posts
Default Re: Miller Bluestar Tecumseh OH160 Won't Start

Thanks for your reply, I'm at my wits end. This one has an electronic module, not points, the manual says "Adjust the system so that a .006/.010'’ (.152/.254 mm) clearance exists between the ignition unit and the long trigger pin in the flywheel."
I only use non-ethanol premium gasoline in my small engines and it's fresh. The fuel pump won't let it gravity feed but I pulled the bowl and it was full. You would think it would at least try to start on ether. I replaced the spark plug, had it and the last one out several times. The compression seems good just using my finger while spinning it over. Are these just real finicky engines?
Reply With Quote
  #4  
Old 06-18-2019, 09:24:08 PM
keith1944 keith1944 is offline
Registered
 
Join Date: Nov 2008
Location: roseburg, oregon, usa
Posts: 44
Thanks: 3
Thanked 21 Times in 15 Posts
Default Re: Miller Bluestar Tecumseh OH160 Won't Start

I assume it has the original crankcase pulse pump mounted at the carburetor. Check the fuel pump. Make sure the reed valves are functioning and look for oil on the engine side of the diaphragm. DO NOT overfill the crankcase or the oil will advance into the pump and dampen the action. Sometimes the pump will look like it's doing a good job when you take the fuel line off the carb and spin the engine but won't supply when attached.

As Mr. Mackey said the gap is .010 for the long trip pin and module. but plug gap should be .030 according to my Tecumseh shop manual.

Keith Van Atta
Roseburg Oregon
Reply With Quote
The Following 2 Users Say Thank You to keith1944 For This Post:
  #5  
Old 06-18-2019, 09:58:13 PM
radiodoc radiodoc is offline
Registered
 
Join Date: Mar 2017
Location: Dierks, Arkansas, USA
Posts: 232
Thanks: 124
Thanked 149 Times in 83 Posts
Default Re: Miller Bluestar Tecumseh OH160 Won't Start

Andrew I think his mention of .010 is the gap between the armature and the flywheel?
Reply With Quote
The Following User Says Thank You to radiodoc For This Post:
  #6  
Old 06-19-2019, 11:35:04 AM
bugle bugle is offline
Registered
 
Join Date: Sep 2009
Location: Missoula, Montana
Posts: 59
Thanks: 69
Thanked 8 Times in 8 Posts
Default Re: Miller Bluestar Tecumseh OH160 Won't Start

Thanks for the replies. I pulled the fuel pump apart this morning. There was a little oil in the crankcase side which I cleaned out. That didn't get it started though. It has the LMH 1A 77 carb and it doesn't show any moisture after spinning it over with choke closed, but still, it won't even burn starting fluid regardless of quantity. I tried it several times, charging the battery and letting it sit overnight in case flooded, also pulling plug many times. Starting fluid gets on the plug and it has spark, seems it should do something.
The .010" gap I referred to is between module and pin on flywheel.
Reply With Quote
  #7  
Old 06-19-2019, 01:40:43 PM
Andrew Mackey Andrew Mackey is offline
Moderator
 
Join Date: Nov 2004
Location: Rockaway, New Jersey USA
Posts: 14,145
Thanks: 1,991
Thanked 6,766 Times in 4,300 Posts
Default Re: Miller Bluestar Tecumseh OH160 Won't Start

Yes Radiodoc, space between mag and timing on flywheel

How is the spark you are getting? Bright blue and 'thick' or a pale blue and thin? You may have a bad coil. The fact that the fuel bowl is full means that the carb is getting fuel. Does that carb have an antibackfire valve in it? it is a selenoid operated plunger that stops gas from flowing thru the jets after the ignition is turned off, to prevent hot spots in the combustion chamber from igniting fuel after spark is shut down. If there is something wrong electrically (bad switch or busted wire) or the selenoid is bad, the gas cant get into the engine, The fact that you cant even get a puff on ether points to an ignition problem, either a weak magnet in the flywheel or a bad pick up in the coil. Here is something to try - close the gap between the flywheel and the mag to .005" Turn the flywheel by hand to make sure it does not hit the mag, and see if you get a better spark. One other thing to check - is there any rust on the magnets? If so, that may intefere with the coil operation. Let us know what you find. One last thing - flywheel key correct and installed properly? I have seen some keys installed upside down, which changes timing if it is an offset key.
Reply With Quote
The Following User Says Thank You to Andrew Mackey For This Post:
Reply

Bookmarks


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

F o r u m Jump

Similar Threads Chosen at Random
Thread Thread Starter F o r u m Replies Last Post
Miller bluestar 2e field circuit damon91 Welding Shop 1 11-18-2018 12:12:41 AM
Miller BlueStar 180 Welder / Generator jteague Welding Shop 5 05-01-2015 12:33:21 AM
Miller Bluestar 2 E for sale on trailer Joefromnc Welding Shop 1 09-21-2012 09:02:17 AM
Rebuild of my 1973 Tecumseh OH160 Ralphst16 Small Air Cooled Gasoline Engines 8 08-07-2012 10:08:57 PM
Miller Bluestar 180 Richard Gibson Welding Shop 3 09-18-2009 07:03:19 PM


Use "Ctrl" mouse wheel to change screen size.
All times are GMT -4. The time now is 11:20:40 PM.

Smokstak and Enginads site search!


All use is subject to our TERMS OF SERVICE
SMOKSTAK® is a Registered Trade Mark - A Community of Antique Engine Enthusiasts
Copyright © 2000 - 2019 by Harry Matthews P.O. Box 5612 - Sarasota, FL 34277