OutdoorKing Repair Forum Forums General Discussion Forum Off Topics Suzuki's on 21 inch bases

Just thought I would share a pic of my 2 Suzuki's.
These are great for slopes/trimm mower.
A nicely running engine sounds like a Ferrari, they are light to push and use very little fuel.
I drill new mounting holes and swing the boss and blade plate across.

They make a nice looking BigBobs.



You shouldnt have to do anything like that.
Just pull the rover boss off the crank and put a superswift/masport one on and you can use the original plate with the BigBob blades.
Or you could probably use the rover disc with the blades from a 21" rover Ute. Its almost the same looking thing as a BigBob.
If not rover disc and the blades from an older 20" rover super 4.


Whatever you did, pics and an explanation would be appreciated.


I have a Masport here with a Briggs 2 stroke on it. Ive seen a Granberg with the same motor. I seem to recall seeing a BigBob with one too.

One day I will have it up and running along with a couple of the Suzuki motors i have here. I was thinking of having them fitted to BigBob bases, then I could do a direct comparo. I sorta wanted to compare the Victas in there too. Wait and see.

G'day again Bob,
I always wanted a Briggs 2 stroke and when I eventually got one, I could never get it running right, no matter what I did to the governor set up, wouldnt run right.
Anyway, got fed up and sold it.

I have done suzuki engines up and plan to get the techumseh off this one and mount up another Suzuki.


Even though it is a large engine and running well, it is a 4 stroke and wont suit the embankments we mow. (Everyone seems to rag Techumseh, I'm not sure why, everyone I have had started easily and ran well)

The way I mount the suzuki engine, well the hole in the big bob base is off centre, so you have to come up with a way of placing the suzuki's mounting plate so that the shaft will be dead centre in the base when fit the engine.
Then mark and drill your holes.

Yes, I use the original boss & blade plate fro mthe original engine. The engines I have taken off so far have been a Briggs 4 HP and a Techumseh 4.5.

I am about to do the same to the orange one shown, I will make it a project on this site and take shots as I go.

Im still not sure what you are meaning about the holes.

The Briggs, Victa, Honda, Tecumseh engines all have the same mounting bolt pattern. I have not actually mounted or unmounted a Suzuki off anything yet, but the one on I have on the desk in my office looks to be the same as all others, even down to useing imperial bolts.
If bases have more than one drilling its just for a different mounting psoition, plug forward, to the side or to the rear.


Im the same with the Tecumseh. They are not that bad. Well except the Ultima 50 motor, it was crap. The main drawback is the carb design and the lack of a fuel tap. But then the Quantum briggs motors are the same.

G'dsy Rob,
You have saved me some time & effort, I have started the next 21 inch base powered by a Suzuki 2 stroke.
The last 2 of these I did a while ago now & like a cave man just started drilling, when I didnt need to.
Didnt occur to me at the time that I could unbolt & spin the mounting plate.

Still not sure why you would need to rotate the plate.

Have you had to do that for all of them?

The dual drilling, I suppose like what is on the Rover base, is for sideways or forward mouting but the motors on rover with that base are all fwd mounted.


Id have to go look at one of the engineless rover bases ive got here to check but im pretty sure they only have one set of holes drilled and there is one hole thats drilled but not used.
The earlier blue bases were dual drilled as the motor could be sideways or forward, or the even earlier, sideways or rearward. The later victas were also dual drilled for sideways and if the spacer ring was used for forward mounting.

I have placed a suzuki engine on a Flymo, Victa, Masport & the big bob base.

The only way the holes will line up, is with the plug pointing out to the side. (like in the image above).

So, this time I will take the mounting plate off, rotate it so the dipple is pointing over the grass shute, then rotate the engine so plug is facing forwards.

Hey, I dont have to gin around as much this time, its all good.

I just went out & placed a 4 stroke on the rover base it uses the other set of holes, so this means the reason the ROVER base has two sets of holes.
Is one set of holes is to accommodate the suzuki engine.

Actually i think you might find that its just that the suzuki base mounting plate is 90 deg around on its crank case mount for some reason.


If you put that same 4 stroke around plug to the side the holes will line up.

I placed a briggs engine on a rover base like in the image & the mounting holes line up with the Suzuki holes.

You will find that the briggs can be easily turned to hae the spark plug facing forard by using the other set of holes, some of the older rovers have the engines sideways like that most of the nwer ones have them facing forward. Same as the victa bases, there are two sets of holes for either orientation as some of the 4t's were sideways (and the powertorques used these holes also) while the others were forward facing...

Ok, great thanks Joe,

Do you have a preference for which way you would mount a 4 stroke, I guess if it was side ways, the spark plug could get knocked.

Fuel tank at the front?
Exhausting into the base?

I rarely change the orientation from factory, I usually mount them however they look and function the best, I like the exhaust coming out the side but it's also important to make sure the starter is facing backwards so you don't pull the mower ontop of yourself trying to start it.

Yeah have a few of the rear pull (over the top of the cylinder) rover ones. Always looking for the side pull ones for sideways victas.
Thats where the gear start briggs are good.



The sideways spark plug cap thing is an issue. Worse on power torques with no guard. Dont they hate wet grass if the boot has a hole in it.


Forwards is the go for any mower you can get to go that way.
Sometimes there is no clearance under the fuel tank or carb to let you do this.
The rear facing old rovers werent a bad idea either. Makes a better battering ram, and thats got to be a good thing.
I am not sure why any of the Victa Utilities were ever side mounted. Im sure it came down to fuel tank. Silly really as a rear facing power torque would make an awesome battering ram.


I think with certain somethings pointing forward there is an issue with fin clearnace under the front of the head and the start of the arch on the base. Swipe with the grinder fixes that. I think its certain Tecumseh on a Victa base. Dunno, it might be a briggs but its probably a tecumseh.


Heres the base on the top of my stack.

So they are dual drilled.
That one you posted up looks like its been drilled, i see shiny aluminium.

I made this up.


Take a regular Victa power torque base. (power torque is the same pattern as a briggs etc just with an extra hole) The metal plate from under a power torque on a Full crank steel base (you could use an alloy mustang base, some of these had the lugs underneath that just needed drilling), set the plate out on the base and measure a million times. Mark and Drill it out. Then put the plate on a dual drilled Victa base and you can mark up the forward facing holes (the ones with arrows)

So now i can get a steel base victa with a dead full crank on it. Bolt it on the base and if it has the dimple, drill it for a power torque, or no dimple, a 4 stroke. Then out with the plasma cutter do the muffler cut out and cut out the centre hole, ive got a template for that too, its just a trimmed down cut out from another base.