Simplicity Mouse

Gonna kick off the 5212 build now that I have got some time into it.....bought it for 50 bucks trailered it home...

Anyway got some more work done, got the engine to fire, but all the wiring it toast....

Unfortunately you have to take the steering wheel off to get to the wiring and the bolt was frozen solid.. I tried tro drill it out, but no go so i had to cut the steering wheel off.... bummer....



so got to find a steering wheel, and work on the wiring before i can move forward... but plans are big tires for certain....

the was another giant mouse nest under the gas tank too

Does it have 10 inch rims in the back? They look bigger than 8

CraftsmanQuad19 wrote:

Does it have 10 inch rims in the back? They look bigger than 8

Yes the are 10's

This is the mouse hideout under the steering console...





bought another 18hp opposed, really just wanted the starter and carb, but 25 bucks couldn't not buy it....

The simplicity looks like a nice mower design, kinda like a dynamark. Does the oppy that you are putting the starter on run ?

biggasmowers wrote:

The simplicity looks like a nice mower design, kinda like a dynamark. Does the oppy that you are putting the starter on run ?

Supposedly both of the 18hp motors I have run, but I didn't have a starter or carb to even test it.  So now I do.  The only thing I am not familiar with I think is if you see the carb, it already has a line attached to it, going to the engine block?  Is that a vacuum line for the pump I guess?

I am hoping to put one of the motors on a stand and try to start it soon. Probably not the one in the picture because it does not have exhaust.

Yeah that little box on the front of the carb is a pulse pump, the line goes to the PCV to get a pulse from the crankcase. Cool looking Simplicity! Are one of the oppys going into it?

I doubt the stock hood would fit it. Might have to mount it sideways

AllisKidD21 wrote:

Yeah that little box on the front of the carb is a pulse pump, the line goes to the PCV to get a pulse from the crankcase. Cool looking Simplicity! Are one of the oppys going into it?

Ok kind of thought so, my other 18hp works similar...

I might use one of them in the simplicity I think it would be cool... I am pretty sure the 12hp motor in there runs, but I would rather stick it in something else because I am definitely going to keep this tractor and not sell it. I could find another use for the 12hp im sure, and it is really dirty, needs to be cleaned on a bench.

So if one of the 18s runs good I will, since the wiring needs to be done from scratch anyway.

That oppy in that awesome frame will be super sick!

CraftsmanQuad19 wrote:

I doubt the stock hood would fit it. Might have to mount it sideways

I measured its tight, but this hood doesn't really have sides, its open & if I had to cut, I would just cut.

Thats one of my favorite body styles right there.
Its the same as my allis all they did was change the air vents in the grill.  
Ill be watching it come together.

What transaxle does it have? The 801 in mine is moderately heavy, but 10 inch rims? Possible it’s an 820. Here is a pic of mine

CraftsmanQuad19 wrote:

What transaxle does it have? The 801 in mine is moderately heavy, but 10 inch rims? Possible it’s an 820. Here is a pic of mine

according to tractor data it is a 801 and the 10" wheels are correct....
http://www.tractordata.com/lawn-tractors/002/6/4/2645-simplicity-5212-transmission.html

Other thing i got going that could might be related to this is I got this 17hp OHV briggs started tonight finally after getting a coil for it.  It runs good but surges, so the carb is mucked up.. I possibly might use this as a donor motor for it depending on if the opposed motors work out or not.


The tractor is pretty crappy, it had a engine fire, wiring/solenoid area mostly. It is a hydro, I dont have much interest in it, the steering gear is crap, I could flip it or part it out.  So the motor seems ok, will clean the carb & test again.

Idk how the coils go bad, but when they do it pretty much kills them instantly. i see its one of those "one size fits all" coils from amazon , i have had good luck with them so far.

guess which carb is which........ simplicity is the one that looks like oil and fudge...

Those are some of the worst I've ever seen.

Ick! that is some serious gumming up.

Well, AT Least its not rusted out...

mightyraze wrote:

Ick! that is some serious gumming up.

Its pretty gross, it is like the float has a skin on it, everything seems salvageable except I have no idea if I would try to reuse the gunky float I think it might be brass I thought it was plastic.....  I just wanna make sure the motors run etc.

Finally got the carb cleaned up and rebuilt, took a while...
Will try and start the motor tonight, but the whole thing is apart while im redoing the wiring....

Finally IT RUNS!!! Not keeping this motor in it but either way I want to drive it around soon..

Got to finish the wiring soon and put the steering wheel & everything back on and go for a test ride, but rebuilding the carb fixed it up....

Nice ! I have a carb that is the previous version of the one you have, its quite interesting but i don't think i am going to put the time in to clean it up because of how old and brittle the seals all are.