Toro 724 Tecumseh -> Predator 212 - Snowblower Forum : Snow Blower Forums
LinkBack Thread Tools
post #1 of 2 Old 03-09-2019, 12:33 AM Thread Starter
Junior Member
Join Date: Feb 2019
Location: Star Valley, WY
Posts: 3
Post Thanks / Like
Thanks (Given): 3
Thanks (Received): 0
Likes (Given): 2
Likes (Received): 0
Toro 724 Tecumseh -> Predator 212

My '87 Toro blew its original engine over a month ago. I bought it last summer for $150. It would only ever run with the engine choked but it was usable. Would bog down in anything over 4" of powder but I got used to it.

I picked up a Predator 212 at Harbor Freight and got it in place on the frame. I had to drill some new mounting holes to align it properly. Also had to buy a crankshaft bushing. I scrapped all the wiring off the handlebars and installed a tether/kill switch but there's a short somewhere. Neither the kill switch nor the on/off switch will stop the engine now. I'll tackle that later.

When I first started it up it didn't want to run above idle so I figured the main carb jet was too big. I live at 6000' elevation so I figured it was drowning in fuel when I couldn't rev the engine without stalling it. The power chart for Honda says for every 1000' above sea level you lose 3.5% power if I remember right. So I did some math and figured I need a .023-.024 jet.

I ordered a high performance jet kit by mistake and tried messing with the two jets that came with it. I soldered them closed and tried drilling one out but buggered that job. I didn't have the correct size drill bits at the time. I tried using wire from a wire brush, tried a paper clip. Nothing worked. I ended up getting a set of #61-80 drill bits from Rockler to make the jet drilling easier.

I found some .026 (stock is .0307 or #78) Honda jets at It seemed the most reasonable deal I could find. Not happy with the delivery time but they finally arrived. I was disappointed at first because they appeared to be stainless and not brass. I didn't believe I would be able to solder or drill them out if I needed.

This morning I took some time to monkey with the engine. I installed a soldered jet drilled with a #73 bit and started up the engine. It idled beautifully but was hunting pretty bad at high rpms. So I took started stepping up sizes with the other jets. To resize a carb jet it was very easy to place a jet in my cordless drill chuck and hold the small drill bit with a pair of pliers, using the cordless drill as a lathe and the pliers as the tool holder. The gray metal Honda jets drilled like butter.

I stepped through each size of bit all the way to #65 (larger than stock) before I finally got the engine to quit hunting and run just a little rich at high speed. Its not super smooth at high rpms, stumbles a little, a little dark exhaust, and doesn't truly smooth out unless I back the throttle off to 70-80%. Then it runs great. I don't understand how I ended up with such a large jet orifice when the stock jet wasn't working well. Sometimes it goes lean at full throttle and starts hunting again. Is there something else I can do to improve the air/fuel ration? I tried pulling the airbox cover but didn't notice a change. I did not pull the air filter and the vents from the valve cover and gas tank are still in place.

I haven't put it too work yet. It looks like we're getting some light snow tonight so I might try it tomorrow.
Attached Thumbnails
Click image for larger version

Name:	20190308_221848.jpg
Views:	82
Size:	163.3 KB
ID:	154729  
Leavitt is offline  
Sponsored Links
post #2 of 2 Old 03-11-2019, 06:42 PM
Join Date: Feb 2016
Location: South Dakota
Posts: 42
Post Thanks / Like
Thanks (Given): 0
Thanks (Received): 3
Likes (Given): 1
Likes (Received): 14
I’d try pulling the air filter off all together.
LB522r is offline  
Sponsored Links

Quick Reply

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


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

Email Address:


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Honda HS720C vs Toro 721QZR BMR General Snowblower Discussion 16 10-29-2014 10:28 PM
Ariens 24 vs. Toro PowerMax 724 ? Spokaneman General Snowblower Discussion 17 11-23-2013 02:29 PM
Toro Customer Service moretorque05 Toro Snowblowers 2 11-15-2013 05:22 PM
Toro with Tecumseh AH600 bwdbrn1 Toro Snowblowers 2 10-04-2011 08:24 AM

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