Tecumseh HM80 info needed please... - Snowblower Forum : Snow Blower Forums
 
LinkBack Thread Tools
post #1 of 8 Old 02-13-2016, 12:52 PM Thread Starter
Senior Member
 
Join Date: Jan 2016
Location: Central NH
Posts: 352
Post Thanks / Like
Thanks (Given): 17
Thanks (Received): 20
Likes (Given): 103
Likes (Received): 73
Tecumseh HM80 info needed please...

Hi Guys,
I have an Ariens ST824 from 1987 with a Tecumseh HM80 engine.According to my tachometer, the engine speed is set rather low on the high end,thus the machine throws rather poorly.

I have the Ariens service manual that covers this machine and it lists 3600 rpm for the high speed setting.What is not given,and I can't find it in any Tecumseh manual I own,is what rpm is this engine supposed to IDLE at?

Any help would be appreciated.Thanks.
Mike C. is online now  
Sponsored Links
Advertisement
 
post #2 of 8 Old 02-13-2016, 01:15 PM
Moderator
 
Shryp's Avatar
 
Join Date: Jan 2011
Location: Cleveland, OH
Posts: 4,159
Post Thanks / Like
Thanks (Given): 1
Thanks (Received): 196
Likes (Given): 6
Likes (Received): 250
I think it is around 1200 rpm for idle.

Please direct all snow blower questions to the forums and not to me with PMs.
Shryp is offline  
post #3 of 8 Old 02-13-2016, 01:36 PM
Senior Member
 
Join Date: Mar 2014
Location: Lowell area, MA
Posts: 3,246
Post Thanks / Like
Thanks (Given): 118
Thanks (Received): 277
Likes (Given): 358
Likes (Received): 633
I guess 1200 sounds a bit low to me. I have my Tecumseh idling around 1700, I think, from looking at the tach the other day. I'm trying to remember where there might be a suggested spec for idle speed, most likely by Tecumseh, but I'm not sure.

People have mentioned that you don't want the idle speed too low, or else the oil slinger may not do its job properly, and you could deprive the internals of proper lubrication at idle.

Ariens 1024 Pro
Toro Power Clear 221QR
Toro Power Curve 1800
RedOctobyr is offline  
Post Thanks / Like - 0 Thanks, 1 Likes, 0 Dislikes
Likes wildbill59 liked this post
post #4 of 8 Old 02-13-2016, 01:40 PM
Junior Member
 
Join Date: Jan 2013
Posts: 25
Post Thanks / Like
Thanks (Given): 11
Thanks (Received): 1
Likes (Given): 10
Likes (Received): 1
I also searched high and low for RPM speeds for my tecumseh driven snowthrower. Everything referenced "page 30 of the Microfiche". Never did find it....

Marc Fish
Capital District area, NY USA

'06 Craftsman (MTD)#247.88790 9hp Tec 28"
2 stage Engine #LA318SA-156554
*****************************************
'95 Craftsman II (???)#536.886360 10hp Tec 30"
2 stage TracPlus (reclaimed)
Opfoto is offline  
post #5 of 8 Old 02-13-2016, 01:41 PM Thread Starter
Senior Member
 
Join Date: Jan 2016
Location: Central NH
Posts: 352
Post Thanks / Like
Thanks (Given): 17
Thanks (Received): 20
Likes (Given): 103
Likes (Received): 73
Hi guys,

I just dug out another manual that deals with garden tractor repair.In the Tecumseh engines section it gives 1800 rpm for all VM,HM and HH 70-120.

Then I found the owner's manual for my Toro 521 that I thought got thrown out years ago.Surprisingly,this spec is given for the HS50 engine that originally was on it-1750 rpm.Strange that they never mention the high speed setting at all.

So it looks like 1800 is probably a good number.

Too bad someone who has access to the elusive "Tecumseh microfiche card 30" wouldn't make that info available here...
Mike C. is online now  
Post Thanks / Like - 0 Thanks, 1 Likes, 0 Dislikes
Likes Grunt liked this post
post #6 of 8 Old 02-13-2016, 03:04 PM
Senior Member
 
bad69cat's Avatar
 
Join Date: Nov 2015
Location: Cedar Rapids, Iowa
Posts: 1,237
Post Thanks / Like
Thanks (Given): 0
Thanks (Received): 88
Likes (Given): 127
Likes (Received): 277
If anybody does have a microfiche card(s) I have a machine at work that will convert them to PDF files...... I'd be willing to take and them available for everyone. Just throwing that out there.




I am deathly allergic to shovels!


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
bad69cat is offline  
Post Thanks / Like - 2 Thanks, 2 Likes, 0 Dislikes
Thanks Kensico, wildbill59 thanked for this post
Likes Kensico, wildbill59 liked this post
post #7 of 8 Old 02-13-2016, 04:09 PM
Member
 
Join Date: Jan 2016
Location: Duluth, Mn.
Posts: 95
Post Thanks / Like
Thanks (Given): 2
Thanks (Received): 5
Likes (Given): 9
Likes (Received): 17
In my experiance, these engines hold together much better if you don't run them at full RPM. 3200-3400 RPM really extends their lives.

If your really concerned about throwing the snow, do the impeller mod. It'll help more than running the engine at higher RPM.
Zedhead is offline  
Post Thanks / Like - 0 Thanks, 1 Likes, 0 Dislikes
Likes Kensico liked this post
post #8 of 8 Old 02-14-2016, 05:12 AM
Senior Member
 
Join Date: Nov 2014
Location: Moultonboro, NH
Posts: 111
Post Thanks / Like
Thanks (Given): 21
Thanks (Received): 13
Likes (Given): 172
Likes (Received): 28
Try this link:

Tecumseh Service Manuals
AriensPro1128 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Snowblower Forum : Snow Blower Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome