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Joined: Feb 2008
Posts: 235
Likes: 4
Sapper Offline OP
Apprentice level 3
Hi all,

I picked up a Masport 400, a light grey mower, chrome handles, black grip, alloy base from a deceased estate sale. The old fellow must have really looked after it. It has what looks like a Quantum 35/40 or thereabouts (stickers missing off the engine, only thing missing), and I couldn't work out how to start it at first, as there was no primer bulb. Anyway, after some research, I found it had a choke system, where you put the throttle lever all the way towards you, wait a few seconds, then pull the cord. It came to life, then I moved it into run. Engine is in excellent condition, as is the base, with virtually no bit of rust anywhere, no wheel play, and has definitely been kept away from the elements it's whole life.

Anyone know how many of these choke type briggs were sold? Are they fairly reliable? I haven't run across any before I picked this one up, and am tempted to keep it as a personal use unit since it has only had the one, obviously caring, owner.

Very similar to this unit:

[Linked Image from i.ebayimg.com]

Also, anyone think a Masport 18" mulch plug might fit this?

Last edited by Sapper; 29/03/23 03:45 PM.
Joined: Sep 2015
Posts: 2,052
Likes: 146
SENIOR TECHNICIAN & HISTORIAN
Hi Sapper,

I've had a lot with the choke and never had a problem with them ,they are more reliable than the primer system.

I've never tried the Masport 18" mulch plug in a Masport 400 but you could check part numbers on both plugs to see if they
are the same.

Cheers
Max.

1 member likes this: Sapper
Joined: Jan 2016
Posts: 7,466
Likes: 143
SENIOR TECHNICIAN
Hi Sapper, give me one with a choke any day of the week

1 member likes this: Sapper
Joined: Feb 2006
Posts: 4,675
Likes: 164
SENIOR TECHNICIAN
Norm, in a recent thread, you mentioned that you have converted some Briggs with these primers to a choke system because.you were having problems with the filter housing not sealing properly against the carburettor, rendering the primer inoperable. AVB mentioned they warp and Tyler had resorted to using two gaskets to get them to work.
In other words Sapper, you're on a winner. These Briggs Quantum primer systems can be a problem child.


Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
1 member likes this: Sapper
Joined: Feb 2008
Posts: 235
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Sapper Offline OP
Apprentice level 3
Originally Posted by Mowerfreak
Norm, in a recent thread, you mentioned that you have converted some Briggs with these primers to a choke system because.you were having problems with the filter housing not sealing properly against the carburettor, rendering the primer inoperable. AVB mentioned they warp and Tyler had resorted to using two gaskets to get them to work.
In other words Sapper, you're on a winner. These Briggs Quantum primer systems can be a problem child.

Hey MF,

This reminds me of a video I watched about a year ago;




I am guessing this is the problem you are having Norm? I made a mental note of this issue after I watched the video, just in case I had to do any surgery myself.

I'm very happy I managed to get this mower, even more so after what you guys have said. I have been watching a few videos on how the system works.

What decade do you think this mower is from? 90's?

Joined: Feb 2006
Posts: 4,675
Likes: 164
SENIOR TECHNICIAN
That was a great find Sapper. I recently swapped over a carbs and primer box from a discarded Rover onto the Briggs on a Victa that refused to run and now it runs.
I will now re -torque the two screws after seeing the clip in case I have over tightened them.


Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
Joined: Feb 2008
Posts: 235
Likes: 4
Sapper Offline OP
Apprentice level 3
Hey guys,

Just wondering if anyone has any knowledge on what blades this mower would use? I have tried finding the manual online, but it keeps giving me the Masport 400 reel mower manual.

Joined: Jul 2018
Posts: 2,086
Likes: 80
SENIOR TECHNICIAN
Depends if its a 2 or 4 blade. I have had one of each. If its the 2 blade bar, it takes ga spares bnc5345 and if its a 4blade disc it takes 2 pairs bnc3237.

1 member likes this: Sapper
Joined: Feb 2006
Posts: 4,675
Likes: 164
SENIOR TECHNICIAN
Originally Posted by Tyler
Depends if its a 2 or 4 blade. I have had one of each. If its the 2 blade bar, it takes ga spares bnc5345 and if its a 4blade disc it takes 2 pairs bnc3237.
That's handy for me too, as a lady I know is going to get me to change her Masport blades for her.


Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
Joined: Feb 2008
Posts: 235
Likes: 4
Sapper Offline OP
Apprentice level 3
Hey Tyler,

2 bladed bar. Thanks very much for that.

Joined: Jul 2018
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SENIOR TECHNICIAN
MF, that is info specific for this model. if it is a 'quadcut' or 19inch it is different again

Joined: Feb 2006
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SENIOR TECHNICIAN
What would this new one I took at Bunnings the other day take? It's a two bladed model.

Attached Images
IMG_20230421_181625_copy_992x560.jpg (70.34 KB, 68 downloads)
IMG_20230421_181647_copy_800x452.jpg (33.24 KB, 68 downloads)

Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
Joined: Feb 2008
Posts: 235
Likes: 4
Sapper Offline OP
Apprentice level 3
Hey MF,

This is the spec site for the mower. There is a download of the manual on the page, but after a quick scan it doesn't appear to say which blades to get? Maybe I missed it.

https://masport.com.au/outdoor-gard...ther-petrol-models/bunnings-s18-470-2-n1

Joined: Jul 2018
Posts: 2,086
Likes: 80
SENIOR TECHNICIAN
Hi MF, that one would take bnc5345 as well.

That one is actually a new model only released in the last month. Hers would most likely be a 470 series with briggs and stratton 140cc. To make matters more confusing, if the 470 series is before 2020, it will have 4 blades. Bunnings got masport to despec the 470

Joined: Feb 2006
Posts: 4,675
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SENIOR TECHNICIAN
Is Loncin the same supplier of the non Briggs ohv engines to Victa?

The small rear wheels, same as the fronts scream another cost cutting measure.


Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
Joined: Jul 2018
Posts: 2,086
Likes: 80
SENIOR TECHNICIAN
No, Victa ohv motors are made by sumec, the same bargain basement crap used on aldi and yardking mowers

Sumec is a part of sinomach, a CCP owned and operated group of machinery/industrial manufacturers. The motors are made to the lowest price point

Loncin is a company in itself, who also make motor bike engines for BMW among others.

Loncin make good motors to the point where I would seriously consider taking one of their cast iron liner equipped 159cc over a briggs of similar size

Masport have run same size wheels on a lot of models over the years, the main negative about them is they are plain bushed wheels not ball bearings

Joined: Feb 2006
Posts: 4,675
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SENIOR TECHNICIAN
Here's some I took in another hardware chain yesterday. The undersides appear in the order of the mowers.
I also discovered the mower shop a few doors down the road had closed it's doors permanently. There were a lot of discarded items to pick through. Among those I scored were a few large AF sockets, a ring compressor and even a new pack of Masport blades as well as a spare Victa later type fuel cap and a grill for a Victa dress cowl.

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Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
Joined: Jan 2016
Posts: 7,466
Likes: 143
SENIOR TECHNICIAN
Good to see Masport have rectified their cracking blade carrier problem

Joined: Jul 2018
Posts: 2,086
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SENIOR TECHNICIAN
MF, Mitre10 do stock quite a few masport silver range and one red. the boxer on the left has the quickcut bar and takes bnc5345, the 2 different 18in (flat front) ones both take bnc3237.

If they were 19in, the flat round discs would take BNC8445. Quickcuts generally aren't used on 19in but if they were you would use BNC6503

The curved shape carrier is the quadcut vacuum disc - having run one without blades just to see, i can confirm it makes decent suction on its own (same as having a 80% worn 2 blade disc - a bit of vacuum but not a tonne. This strength proves to be its undoing - its blades can be fairly shot and it will still half catch alright. With the blades worn and the disc picking up and throwing the grass, the divots in it build up with grass. this unbalances the disc and cracks it.

On 18in with these quad cuts, use 2x bnc5345 and on 19in use BNC6503

Then there is the 18in heavy duty chassis that looks identical to the 19in but is actually an 18... confusing hey haha

Norm, yes havent seen a cracked disc in a good while - I do reckon they changed the carbon content in the steel though as I am seeing more with rounded blade holes

Joined: Feb 2006
Posts: 4,675
Likes: 164
SENIOR TECHNICIAN
I personally like the entry level red model with it's two bladed disc. I theorise that the smaller carrier (and bar blades) leave more room for clumps of grass and any other debris to move under the base without bogging up the motor and blade disc. My neighbour's newish Victa has a similar scrawny blade holder and it did a pretty mean job of sucking up a heavy carpet of leaves from the lawn, much better than expected.
I'm tempted to try the smaller disc with a powertorque mower.
Back to the a Masport, the only thing I'd like to change is to have ball bearing wheels fitted.


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