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#91612 03/06/18 11:05 AM
Joined: Jan 2016
Posts: 8,084
Likes: 219
SENIOR TECHNICIAN
The seller claims this is a 2 stroke Briggs and what I can't work out is that the head doesn't look like a normal Briggs head.
https://www.gumtree.com.au/s-view-details.html?

NormK #91613 03/06/18 11:40 AM
Joined: Nov 2013
Posts: 6,938
Likes: 304
Forum Historian
G'day Norm
That link is not working

But this has been covered here.
The Briggs in question is most probably the excellent Komatsu Zenoah engine of the 1980s
Rover did buy these engines. It was a brilliant, refined motor.

See images below.

Cheers
Jack

p.s. Also not that Briggs did make a small 2-stroke post WWII for
snow throwing machines. I think these were called Snow Blower 2-strokes.
I was told that these were made by ... Harley Davidson at Milwaukee - just
down the road from Briggs headquarters.

Here is more modern Briggs Blower engine.
I don't know its origin.




Attachments
1987 Briggs 2-stroke.jpg (345.88 KB, 121 downloads)
capture_2014_12a.jpg (56.36 KB, 121 downloads)
NormK #91615 03/06/18 12:04 PM
Joined: Jan 2016
Posts: 8,084
Likes: 219
SENIOR TECHNICIAN
Hi Jack it could be, looks Briggs petrol tankl,muffler and it is fitted to a Greenfield mower. Hope this link works.

https://www.gumtree.com.au/s-view-details.html?adId=1185522013

Attachments
greenfield_gumtree_2018_01.JPG (53.85 KB, 116 downloads)
greenfield_gumtree_2018_02.JPG (47.86 KB, 114 downloads)
greenfield_gumtree_2018_03.JPG (51.51 KB, 116 downloads)
Last edited by CyberJack; 03/06/18 12:58 PM. Reason: Added Images for Record
NormK #91616 03/06/18 12:56 PM
Joined: Nov 2013
Posts: 6,938
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Forum Historian
Hi Norm
Yep, that link worked.
I have added images to your post for the record.

I forgot that Greenfield also bought the Briggs-Komatsu.
As you noted, there is a clear similarity between the then new Quantum
and 2-stroke styling - all Briggs, and intended.

Finally, the sleeping Leviathan, Briggs, was responding to better
Japanese designs. In some cases they made designs under license.

I am told the Briggs-Komatsu association failed ... not because of design,
but because of a change in exchange rates between the USA and Japan
at the time. It became un-economical.

That is a pity - because it was such a great motor!
I clearly remember its flatter torque over a wide RPM range.
Way ahead of any Power Torque (Sorry Norm frown ).

The mechanical governor was superb. You could set the engine at idle
and let the gov do the work. Amazing!

Cheers
--------------------
Jack


NormK #91618 03/06/18 10:51 PM
Joined: Jan 2013
Posts: 956
Likes: 20
Moderator
Hello Gents, they really are a good engine, i've had a couple over the years. For the Record, it was Masport that were using the Komatsu, not Rover. Rover opted for the suzuki and like the Briggs relationship , especially here in Aust around the late 80's with the recession the, relationship dwindled due to the exchange rate.
Overall though they are an exceptional engine, and like their 4 stroke cousins were available in standard form and in the IC trim.
Cheers, Ted

NormK #91620 03/06/18 11:21 PM
Joined: Feb 2006
Posts: 4,675
Likes: 165
SENIOR TECHNICIAN
Howdy folks,
Hope they weren't as temperamental as the Suzuki unit. I'd like to get my greasy mits on one of these Komatsu 2 strokes. Who made the carby with this amazing governor? Anyone know the fuel mix ratio?


Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
NormK #91623 04/06/18 12:40 AM
Joined: Nov 2013
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Forum Historian
Quote
For the Record, it was Masport that were using the Komatsu, not Rover.
Hello Big Ted and Mowerfreak, and all
Big Ted, I stand corrected. Many thanks.
Yes, Rover opted for the Suzuki, not the Briggs-Komatsu.

Cheers
Jack

NormK #91626 04/06/18 08:57 AM
Joined: Jan 2016
Posts: 8,084
Likes: 219
SENIOR TECHNICIAN
Yes MF the Suzuki is a great motor, so smooth but for some reason the carby is problematic

NormK #91635 04/06/18 07:38 PM
Joined: Jan 2017
Posts: 726
Likes: 4
Senior Contributor
Wow, this thread has answered a question that had been on my mind for a while now. I saw another ad on gumtree a while ago which showed Rover mowers with engines that the seller claimed were "2-stroke Briggs engines". I found this a bit perplexing.

So it looks like the engines were actually Suzuki engines. Thanks to this forum I now know the answer. :-)

NormK #91637 04/06/18 09:50 PM
Joined: Jan 2016
Posts: 8,084
Likes: 219
SENIOR TECHNICIAN
And the Suzuki copy motor is still readily available
https://www.ebay.com.au/itm/LAWN-MO...MARKET-IRONHORSE-BRAND-NEW/282844201214?

Attachments
s-l1600.jpg (110.2 KB, 43 downloads)
s-l1600_2.jpg (95.79 KB, 42 downloads)
s-l1600_3.jpg (129.31 KB, 43 downloads)
s-l1600_4.jpg (93.96 KB, 42 downloads)
Last edited by Bruce; 08/06/18 07:44 AM. Reason: Images added
NormK #91639 04/06/18 10:39 PM
Joined: Feb 2006
Posts: 4,675
Likes: 165
SENIOR TECHNICIAN
Hi Norm,
Originally Posted by NormK
And the Suzuki copy motor is still readily available
https://www.ebay.com.au/itm/LAWN-MO...MARKET-IRONHORSE-BRAND-NEW/282844201214?
What about the carburettor, seeing as that is source of the troubles?
Fancy going for 125 haha...


Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
NormK #91640 04/06/18 11:06 PM
Joined: Jan 2013
Posts: 956
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Moderator
The Suzuki Copy is actually known as an Ironforce according to Masport. I've got one here at the moment and the genuine carby on it is made by Ruixing. The carby's are available on Ebay from the carby_doctor for about $40.

NormK #91642 05/06/18 08:16 AM
Joined: Jan 2016
Posts: 8,084
Likes: 219
SENIOR TECHNICIAN
Problem is for me Bigted is a $40 carby is way out of the question for me to be able to try and keep my hobby/pain cost neutral. The last Rover/Suzuki I had I sold for $25, it was running ok but was hunting a bit and needed a puff of starter fluid to get it started. I had wasted so much time on it,pulled the carby to bits a number of times but still couldn't get it right. Was very happy to see it go up the street.

Joined: Jan 2012
Posts: 1,842
Likes: 14
Moderator
G'day folks,
Originally Posted by Mowerfreak
Anyone know the fuel mix ratio?
50:1 was the recommended ratio. Specs are 141cc, 60mm bore, 50mm stroke.

Briggs Model Nos for them are 0957xx and 0967xx - the 'xx' can be 22 or 32.

SupaSwift also fitted these engines, back when they were available - I've seen a Big Bob advertised with one.


Cheers,
Gadge

"ODK Mods can explain it to you, but they can't understand it for you..."

"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."
NormK #91654 05/06/18 11:29 PM
Joined: Jan 2013
Posts: 956
Likes: 20
Moderator
Yes Norm i agree, $40 is pushing it when you're repairing a mower and selling it for anything less than $100.

NormK #91655 06/06/18 12:21 AM
Joined: Feb 2006
Posts: 4,675
Likes: 165
SENIOR TECHNICIAN
Hello bigted, ok, however, if you intend using the mower yourself long term.


Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
NormK #91661 06/06/18 11:37 PM
Joined: Jan 2013
Posts: 956
Likes: 20
Moderator
Hi MF, agreed, it just depends what your going to do with the mower. If i was selling it for $200 i'd definitely lash out the $40 for a new carb.

NormK #91662 07/06/18 04:32 AM
Joined: Jan 2016
Posts: 8,084
Likes: 219
SENIOR TECHNICIAN
Bigted, using that ratio then if selling the mower for $80 you would need to buy the carby for under $20 and even then it becomes a bit borderline

NormK #91668 07/06/18 09:26 PM
Joined: Mar 2013
Posts: 193
Apprentice level 2
My 2 cents - enquired the price of the carb from the Bay seller for the Chinese copy - was quoted $80 plus freight!

The $40 carbs from CarbyDoctor are superb - good value as no on else can offer any close in price or quality and he is always great to deal with.....

NormK #91669 07/06/18 09:34 PM
Joined: Feb 2006
Posts: 4,675
Likes: 165
SENIOR TECHNICIAN
Hi DB,
It's still abit steep compared to new carburettors for four strokes which are a third the cost in some cases.
I'll reiterate, if I were to want to keep the mower for personal use, I'd consider the spend, but I would sell mine as is and let the next owner get one should I want to flog one off.


Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
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