Toro Suzuki 2 stroke (47P) overheating coil / transistor solution - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information
 
LinkBack Thread Tools Display Modes
post #1 of 15 Old 05-17-2012, 01:14 PM Thread Starter
MTF Member
 
Join Date: Apr 2011
Location: Fl
Posts: 94
Toro Suzuki 2 stroke (47P) overheating coil / transistor solution

Well, someone beat me to it;
http://forums2.gardenweb.com/forums/...330021380.html

Just a public service announcement as we jump into mowing season, for anyone who's suffered the infrequent, but frustrating 47P engine dying/restarting problem due to over-heating transistor imbedded on the coil (and bought an entire $200+ coil to fix it), your prayers have been answered. ..c'mon now, that only took 25 years


I understand some LB coils with imbedded transistors suffer this issue as well.
viking427 is offline  
Sponsored Links
Advertisement
 
post #2 of 15 Old 05-17-2012, 01:46 PM
Senior MTF Member
 
paulgp602's Avatar
 
Join Date: Oct 2009
Location: Earth
Posts: 164
Re: Toro Suzuki 2 stroke (47P) overheating coil / transistor solution

What does the 47p mean? How can I tell if my Toro Suzuki has this diode? Didn't they do away with the diode later on?

I have a 22040 which according to the serial number is a 1997 model year. Thanks in advance!
paulgp602 is offline  
post #3 of 15 Old 05-17-2012, 02:07 PM Thread Starter
MTF Member
 
Join Date: Apr 2011
Location: Fl
Posts: 94
Re: Toro Suzuki 2 stroke (47P) overheating coil / transistor solution

"47P" is Suzuki's designation for their 2 cycle engine that Toro contracted them for use on Toro mowers. When anyone mentions the old Toro "Suzuki 2 stroke", this is the engine they're referring to. It was installed on many Toro consumer grade and commercial series mowers. It was built for 20 years - 1983-2003.

No, Toro did away with the points & condensor ignition in the 47P's 2nd year of manufacture (1984), in favor of "transistorized" ignition from then on. For the 47P mowers, the coil had the transistor imbedded directly onto its outer casing under the epoxy covering. Toro did continue using externally mounted transistors (like the NOVA or other aftermarket transistor modules) on some of their CCR snowthrowers for a while longer though. Toro did do a coil/flywheel change in the late 80's IIRC, from a 2-leg coil to a 3-leg coil, still transistorized though.

A "transistorized" coil will have a "bump" on its outer epoxy casing about the size of your thumbnail. Chances are, unless its an early 80's design, it has the transistor on its coil. Yes, your 1997 22040 has the transistor on its coil.
viking427 is offline  
Sponsored Links
Advertisement
 
post #4 of 15 Old 05-17-2012, 02:18 PM
Senior MTF Member
 
paulgp602's Avatar
 
Join Date: Oct 2009
Location: Earth
Posts: 164
Re: Toro Suzuki 2 stroke (47P) overheating coil / transistor solution

Thank you for the detailed reply. I hope my coil does't go out on me now!
paulgp602 is offline  
post #5 of 15 Old 05-17-2012, 11:27 PM
Mowerholic
 
BDM53's Avatar
 
Join Date: Feb 2012
Location: Mississippi
Posts: 1,127
Re: Toro Suzuki 2 stroke (47P) overheating coil / transistor solution

Good info, thank you for sharing. All, but one, of mine are the earlier models with points.
BDM53 is offline  
post #6 of 15 Old 05-18-2012, 10:15 PM
Mowerholic
 
BDM53's Avatar
 
Join Date: Feb 2012
Location: Mississippi
Posts: 1,127
Re: Toro Suzuki 2 stroke (47P) overheating coil / transistor solution

Quote:
Originally Posted by BDM53 View Post
Good info, thank you for sharing. All, but one, of mine are the earlier models with points.
I spoke to soon, 2 of the five I have running are 47P series. One of them is a 47PE4. I was trying to locate a year on this motor with no luck. I have gone mower to mower on Parts Tree and could no locate a 47PE4.

Any idea how to tell the year if you cant find a toro model number to attach it to?
BDM53 is offline  
post #7 of 15 Old 05-18-2012, 10:37 PM
2 stroke enthusiast
 
echoman's Avatar
 
Join Date: Jun 2007
Location: Land of the free-home of the brave!
Posts: 6,569
Re: Toro Suzuki 2 stroke (47P) overheating coil / transistor solution

I would like to see pics of this operation. I have a dead coil which was kindly replaced as a donated coil from another member here, but would like to see if they can be salvaged. Heating them doesn't work like it does with LB coils as it seems heat is what destroys these.
echoman is offline  
post #8 of 15 Old 05-20-2012, 01:25 AM
GTP
2000 Posts and climbing!!!
 
GTP's Avatar
 
Join Date: May 2009
Location: Greensburg, PA
Posts: 2,420
Re: Toro Suzuki 2 stroke (47P) overheating coil / transistor solution

Viking a few pictures of the coil hooked up To this nova II would be sweet... Where do we get the nova II ?

Toro 22040 Commercial Suzuki
Toro 22035 Commercial Suzuki
Toro 22031/35/40 Commercial Suzuki Frankenstein
Lawn Boy 10324 DF jetted and R-Tek'd "The Hammer"

Lawn Boy Collection (2 D's, 2 F's, 2 DF's, 2 Ms)
John Deere JX75 5spd, BBC, Kawasaki 6.0hp
Comm Snapper WR 2 Cycle WTI-125 4hp 2cycle

Salvation is not found in a religion...it's found in a person, Jesus Christ, our Lord and Savior.
GTP is offline  
post #9 of 15 Old 05-20-2012, 01:55 AM
GTP
2000 Posts and climbing!!!
 
GTP's Avatar
 
Join Date: May 2009
Location: Greensburg, PA
Posts: 2,420
Re: Toro Suzuki 2 stroke (47P) overheating coil / transistor solution

Found the Nova II
http://www.amazon.com/ELECTRONIC-TRA.../dp/B007BI6FW6

Toro 22040 Commercial Suzuki
Toro 22035 Commercial Suzuki
Toro 22031/35/40 Commercial Suzuki Frankenstein
Lawn Boy 10324 DF jetted and R-Tek'd "The Hammer"

Lawn Boy Collection (2 D's, 2 F's, 2 DF's, 2 Ms)
John Deere JX75 5spd, BBC, Kawasaki 6.0hp
Comm Snapper WR 2 Cycle WTI-125 4hp 2cycle

Salvation is not found in a religion...it's found in a person, Jesus Christ, our Lord and Savior.
GTP is offline  
post #10 of 15 Old 05-20-2012, 08:40 AM
2 stroke enthusiast
 
echoman's Avatar
 
Join Date: Jun 2007
Location: Land of the free-home of the brave!
Posts: 6,569
Re: Toro Suzuki 2 stroke (47P) overheating coil / transistor solution

I also have noticed, some of these zuki coils looks what to be a little ground wire coming from the coil in addition to the actual ground wire/switch lead. Others don't have the short grounding wire. Strange. I would like to try fixing one of the these with a Nova. Never used one of those before, but always looked tempting.
echoman is offline  
post #11 of 15 Old 05-20-2012, 10:02 AM
OMG I got another LawnBoy
 
coolted's Avatar
 
Join Date: Oct 2011
Location: Nebraska
Posts: 1,178
Re: Toro Suzuki 2 stroke (47P) overheating coil / transistor solution

For the first time ever, I wish I had a bad coil.

-Thank you for helping us help you help us.
2-Lawn Boy Liberty
0-V series
1-S21ZPM
1-R7070 promo
1-10550
1-1973 Parmi sno-thro (I use it, works great)
1- 2003 Arctic Cat 4x4
1- Domestic short-hair cat (Slash).
coolted is offline  
post #12 of 15 Old 05-20-2012, 10:31 AM
Senior MTF Member
 
Join Date: May 2010
Location: Virginia
Posts: 387
Re: Toro Suzuki 2 stroke (47P) overheating coil / transistor solution

I threw away my old coil/flywheel. Wish I had kept it so I could try this!
jonboy is offline  
post #13 of 15 Old 05-21-2012, 10:52 AM Thread Starter
MTF Member
 
Join Date: Apr 2011
Location: Fl
Posts: 94
Re: Toro Suzuki 2 stroke (47P) overheating coil / transistor solution

Quote:
Originally Posted by BDM53 View Post
..I was trying to locate a year on this motor with no luck. I have gone mower to mower on Parts Tree and could no locate a 47PE4. Any idea how to tell the year if you cant find a toro model number to attach it to?
Here's some notes I had stashed away on the 47P from different sources, including the service manual and previous discussions/posts;

__________
Toro's "GTS120" engine first came out in the fall of 1982 (1983 model year), under Suzuki model # 47PZ2. This first year engine was the only one with a points-and-condenser-type ignition; all others were solid state electronic ignition.

Other model numbers:
47PZ2 = 1983
47PD3 = 1984
47PE4 = 1985
47PF5 = 1986
47PG6 = 1987
47PH7 = 1988
47PJ8 = 1989
47PK9 = 1990
47PL0 = 1991
47PM1 = 1992
47PN2 = 1993
47PP3 = 1994
47PR4 = 1995
47PS5 = 1996
47PT6 = 1997
47P__ = 1998
47P__ = 1999
47P__ = 2000
47P__ = 2001
47P__ = 2002
47P__ = 2003

A numerical suffix after the model number indicates the blade stopping device type or duty rating:
1 = Zone start (extended rope start)
2 = BBC (blade brake clutch)
3 = Commercial duty engine (no blade stopping device) (47PL0 and earlier models only)
Example 1: 47PG6-2 indicates a 1987 model year engine with a BBC device (models 20584 and 20684).
Example 2: 47PK9-3 indicates a 1990 model year engine for commercial use only (no blade stopping device).

*The engine model # can be found on the little white sticker on the front of the engine shroud, just under the "Toro" or "Proline" sticker. Unfortunately, its often missing, scrubbed off, painted over etc. It makes little difference though since changes to engine itself over the years were very minimal, and with excellent engine diagrams found on sites like "parts tree" etc, finding the parts you want/need is generally straight forward enough. The model # may actually be stamped into the metal shroud in that same location as well, but I dont remember without one in front of me to inspect.
__________


Interestingly enough, EASTMAN INDUSTRIES "19S-2" 19" 2 STROKE Hover- Mower used the "M120X" (marketing jargon) motor, which was also a Suzuki 47P. Except that engine used a heavy duty old-school round, metal air cleaner instead of the typical black plastic ones found on the 47P's. Another upgrade if you can still find one. http://www.ebay.com/itm/ws/eBayISAPI...vip=true&rt=nc



As far as pics of the process of replacing the coil's original transistor with an aftermarket one, I didn't get into it (hope I dont have the need to), that GardenWeb link was for someone else who's "coil" went bad, researched discussions on the topic, saw our discussions on the issue and actually went through the process to fix it, and reported success. Ive known about the aftermarket transistor fix on other mowers for years, but that was the first instance of someone doing it on the 47P that Im aware of.

Last edited by viking427; 05-21-2012 at 11:18 AM.
viking427 is offline  
post #14 of 15 Old 05-21-2012, 11:30 AM
2 stroke enthusiast
 
echoman's Avatar
 
Join Date: Jun 2007
Location: Land of the free-home of the brave!
Posts: 6,569
Re: Toro Suzuki 2 stroke (47P) overheating coil / transistor solution

Great and helpful info viking427! Thanks for posting that.
echoman is offline  
post #15 of 15 Old 10-09-2012, 09:36 PM
Senior MTF Member
 
atomix's Avatar
 
Join Date: Jun 2012
Location: Maryland
Posts: 196
Re: Toro Suzuki 2 stroke (47P) overheating coil / transistor solution

You guys twisted my arm, just ordered this on amazon for my recently difficult to re-start 20684. Pictures to follow eventually. Worst case I harvest the coil from my 'other' Toro with the rust filled tank...that runs awesome.

Several LawnBoys, 1D, 1E, 2F's
2 Toro/Suzuki 2 strokes
Snapper Wisconsin Robin
A few others...
atomix is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information 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











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 



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
Trackbacks are On
Pingbacks are On
Refbacks are On

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