OutdoorKing Repair Forum Forums Restoring, Customising and Modifying Tech Talk Pope Ezi Start 2-Stroke.

Ohh I started something here..... That is NOT the rotary valve model!

The rotary valve model carby track is cast into the bottom half of the crank case and the valve is cast into the output shaft of the crank. The inlet air fuel mix goes through the centre of the crank output shaft and into the engine crankcase that way. The timing is controlled by the location of the inlet port cast in the lower crankcase housing which lines up at the correct time with the on core cast into the crank.

Ty I'm >99.999'% confident that you have a piston port controlled induction motor there.

There is a rotary valve model same as the old boy had is appearing in the Random photos as I type (the orange one with the cowling misssing and the "T" push handle with the individual wheel hieght adjusters, which the old boy tells me were for running along the concrete to get a neat egde on the lawn).... note the inlet although not as clear as I would to really prove the point, however if your know what your looking for......

John

I thought we had sorted that out, no?

Yes it is a side port model.. at first I had thought it was a rotary valve (reed) model but I was wrong....

Go back and read the other posts FAST, You'l learn something

I cant wait to see a video of the mower going... I've only seen one of these in person... and it was almost completely worn out and sounded like it was going to explode but the mower it was was a beautiful contraption that's for sure...


Kori

Fastgrass, the engine in the pics in this thread seems to be a Fuji Robin sold by Teledyne under the Wisconsin brand, there are several pics of them in US Youtube posts. What would be nice to have, is some information on the 1959 Pope rotary valve engine. Is this the picture you were talking about?

Yep thats the one Grumpy!

Spent many afternoons pushing one of those around the yard as a kid! Heaps of torque they were hard to stall out even in high over grown tough grass. Finding any specific engine specs would be a task beyond me I'm afraid... That would be a tough one I think (any old dealers out there?)..

I read (1 of) your post links re: Teledyne engines and skimmed through the manual, the engine construction didn't match well, but I can see where they might of got the design from? Bit like Kirby tecumseh 2 strokes they made them here but the yanks dont have em...?

Just to clear something up for you mate, rotary valve is NOT another term for a reed valve engine.

A reed valve engine uses a metal 'reed' to create a one way valve on the crancase, through wich fuel/air mix is drawn when the crancase forms a vacuume as the piston ascends the cylinder.

A rotary valve engine uses a rotating valve (as FAST has described above) of one form or another to control the flow of fuel air mix into the crank case. the position of the valve is controled by the position of the crank, and is fixed, unlike a reed valve (ie, if you turn an engine till a reed valve opens then hold it, the valve will close over once the vaccume inside has gone, however a rotary valve will remain open)

The frame shoen here and also the engine are dead ringers for the early model Pope Rtry Valve model I have one of the starter pawwl thigys sitting on my benc Brand new Als got a used muffler which again is a dead set ringin as that on the pic . All of the old Popes I had have gone now but may have some pics still The mowwr in the pics have the T bar handle Just the same set up again Cheers Joe

Gah... I was dead tired last night...

My post should have gone " At first I thought it was a rotary valve or spring plate (reed) valve".... oops

Kori

Thanks for confirming that is a rotary valve Pope Joe - any pictures of rotary valve Pope mowers and especially engines would be appreciated. Here is one set of pictures of the engine available on the internet (slide down to bottom of page):
http://www.vintagekart.4t.com/photo_46.html

Wow, that really would be an interesting engine to work on, you can clearly see the inlet track FAST was discribing.

I'll hopfully be starting to work out my pope soon, as mentioned, so I will make sure to provide pleanty of detailed photo's and information once I get inside that engine!

I wish I could get my hands on one of the rotary valve ones, that would be a real treat!

I think I've spied the stone guard / chute that drops into the base slots on the rotary version around the old boys sheds some where for future info...

Anyway... back to topic...

Hope the Ol Pope fires up for you Ty!

I'm getting pretty excited about it actually, this one was originally on the back burner, but now that I have all this extra info, I'm getting keener, so there's been a change in priorities.

This week I'm flat out helping Jeffrey (Blumbly) pack up to move this weekend, but while he's house hunting he will be crashing at mine with his painting setup (16CFM compressor, paint guns, etc.) so I will be doing up 5 mowers in that time (recent promotion gives me the money for paint) they will be my Dad's VC-160 (MKIIIB V111 72VJ), my 62 Cadet, my Purple VC-Sports, my MKI VC-160, and this.

The engine has great compression (top & bottom) strong spark, and smooth movement (this is all by memory, it's been in the back of the shed since march) so I have a feeling it it wont take much to fire up!

I remember there being a great spot of paint under some of the grease for paint match, so I'll be giving this one a full restore!

It has a context to fit into Ty: the Japanese (Komatsu) 2 stroke Briggs used to sell, plus the Suzuki and Kawasaki 2 strokes, and now the Fuji Robin 2 stroke. All of the others seem to have excellent reputations, and from what I hear so does Robin. Parts should be available for all of them, from the Japanese source. I haven't personally seen anything much in Outdoorking archives on Robin engines, but as I recall Bruce regards them as outstanding. Hopefully we'll get a good archival contribution as you become familiar with this engine and get it working properly.

I'm also hoping to provide it that context in my collection.

I would like to have a small series of non-victa 2-strokes, to help diversify the 2-stroke side of my collection.

Currently, on the early side, I have a B.U.X, a Simplex, Villiers 7F, Boundy, and a J.A.P powred mower.

Moving a little further forward I have this Robin, and I have the Suzuki, I am hoping next to come across one of the Komatsu/Briggs 2 strokes, as from what I have seen they are a very unique engine.

The main plan for the mower side of my collection is to provide a good range of Victa models, particuarly focusing on the Series 70 engines, which will be offset by a collection of varios machines displaying a number of different 2 and 4 stroke engines.

Alonside that, I am really getting into chainsaws, I have a little red Shandaiwa I picked up recently, which takes me to 5, however that's a little further off topic, so I'll save the details for when I post the Shindaiwa.

Your on your way to having a very diverse collection there mate!

Now all you need is a briggs 2stroke diesel.... the only engine I've ever seen that ran counter clockwise...







Kori

Kori, This topic is verging near off topic, which is something we need to keep in track, however, you have got me very curios with your comments about this 2-stoke Briggs Diesel.

Is it possible you could post some information on this engine in a new thread in the Idle Chatter section for us to discuss, I'm rather intrigued and would like to find out more about it!