Petter Junior Patent Safety Oil Engine - aka M Type.

May have bitten off more than I can chew here.     Brace yourselves for a deluge of newbie questions.





What I know so far.
It's a two stroke paraffin engine started on petrol. Engine Number is 46716 which, according to my limited info, makes it built around 1919.  Obviously the subject of a prior restoration attempt - some of the nuts are stainless and smaller across the flats and there is evidence of gasket sealant on some parts.  

Good news
Seems to be all there.
Turns over and has good compression.
Castors were dead cheap in Wickes and I had a couple of lumps of timber handy to make a dolly to reassemble it on.

Bad news.
One flywheel gib key has it's head sheared off so could be problematic if I need to remove flywheel.
Inside of water jacket looks like a Martian landscape - that will be filled with citric acid for a few days.

OK, I'll preface my first question with 'excuse my ignorance' - please assume the same for all subsequent questions  

There are two, mismatched, greasers on the crankshaft bearings - one (magneto side) marked Patent Telltale London which has a small spring loaded 'piston' in the cap.  The other (governor side) is unmarked and has a plain cap.
How do these work - just stuff them with grease and tighten up occasionally?



The governor 'follower' (?) has a small pin in one groove which stops it rotating on the shaft. Currently it is in the governor arm groove. Is this correct or should it be in the groove in which the levers actuated by the weights sit



According to the manual I got from IF (half missing), the engine 'automatically' switches over to paraffin once it's warmed up. I suspect that just means that the petrol slowly gets diluted with paraffin.

I'm guessing the 'Patent Diaphragm Pump' will be in need of a new diaphragm - can anyone suggest a suitable material?

From the photo's you seem to have crossed the first hurdle which was actually getting it home, as mentioned in another thread.

Just consider it moving from Junior to Secondary restoration school.

I don't think Villiersparts will be able to help with this one

Looks to be a Victory? On the M types I have they have the plain greasers on a short tube, tube is about 4 or 5 inches long, yes you are right, fill carb with petrol and it gradually changes over to kero, if the diaphragm is shot a biscuit tin will do. Without checking I can't remember about the slip ring but I THINK it should be the other way round...

Hi Villiers,
Any distinguishing features for a Victory model?
When did the name change from  Petter Junior Patent Safety Oil Engine to M Type or vice versa?  
Confirmation of correct fitting of slip ring would be great when you have chance.

The "Patent TellTale" greaser is a "marine" pattern greaser and is therefore probably not original (unless your engine has a marine history).

The Victory has "Victory Model" cast across the top of the head, just in front of the top pipe outlet on the rib, it also has a smaller big end than a standard 5hp engine, the "M2 type was never an M fromm what I can gather and were classed as VA, VAZ and others I think, email Roland at the IF with the engine number, he should be able to date and also say if it's been indexed.

Surprised to see a cast box shaped oiler on the side of the cylinder which I thought was introduced much later, unless they were only produced initially for the larger sizes. I have a 1927 3hp model that has a drip feed glass oiler.

Thanks Gents!

Closer inspection reveals it is indeed a Victory.
Said closer inspection has solved another puzzle. The part manual I have (1922 Model) suggests an oil feed rate of 6 - 10 drips per minute. I've spent days wondering where the glass oiler would be fitted. Turns out it's just a rectangular  hole in the side of the box.

That oil rate seems a bit low to me....
I know my 3hp Appletop has a drip rate of 30 drips per min and I would have thought the Victory to be more....

Villiers wrote:That oil rate seems a bit low to me....
I know my 3hp Appletop has a drip rate of 30 drips per min and I would have thought the Victory to be more....

I agree, but the manual also warns that too much oil will cause plug fouling  
The manual refers to VF or 'good quality cylinder oil',  any suggestions as to a modern equivalent  - SAE30?

Some say SAE30, some say mineral 2 stroke oil, your choice. I use 2 stroke.
And it'll be messy unless you load it up and work it. Next time I am over at the Ex's I will grab some photos of mine for comparison.

Mine having a run a couple of years ago....

https://www.youtube.com/watch?v=FYbZKSlJziA

https://www.youtube.com/watch?v=q8PnEIJcy5Y

https://www.youtube.com/watch?v=fNhTAK2-_a0

[quote="Villiers"]Mine having a run a couple of years ago....

Thanks for posting.