Another uncommon Stuart Turner on the way...

Discussion in 'Discussion' started by Skankin_giant, Feb 6, 2017.

  1. Skankin_giant

    Skankin_giant Well-Known Member

    So I've made a deposit on this Stuart Turner but have 3 long weeks to wait until I can get up to collect.... holidays/work etc.

    [​IMG]image001 by Stephen Williams, on Flickr

    [​IMG]image002 by Stephen Williams, on Flickr

    [​IMG]image011 by Stephen Williams, on Flickr

    [​IMG]image012 by Stephen Williams, on Flickr

    For those who don't recognise the engine it is a Stuart Turner model K, the automatic sets were designed for fridge units and were temperature controlled. Only 63 were made by Stuart Turner with about 5 known surviving.
    Stuart Turner also made an earlier FS (Four Stroke) with some 200 made but as of yet none has surfaced.

    Here are some photos from the sales brochures

    [​IMG]s-l1600 by Stephen Williams, on Flickr

    [​IMG]s-l1600 by Stephen Williams, on Flickr

    Might be counting my chickens but hopefully all will go well for the 26th.

    Cheers, Steve
  2. petternut

    petternut Administrator

    What an interesting machine. It will be enlightening to see more as you go along.

  3. Skankin_giant

    Skankin_giant Well-Known Member

    Will be nice to see one in the metal for once....

    Apparently they employ the same cooling methods used on the likes of the Scott PAB and Glasgow sleeve valve engine, in which air is draws down over the cylinder and vented from flywheel, a way of keeping the crankcase warm in colder conditions?
  4. Skankin_giant

    Skankin_giant Well-Known Member

    The day came when I was able to get up and pick up the Stuart Turner model K.
    I suspect I've said before there was only 63 K's built between 1932 and 1938, sharing a bore and stroke with the P5 2 stroke, the K is a OHV 4 stroke.

    I left my house a 0550 this morning for a journey to Stroud.

    [​IMG]DSCF8059 by Stephen Williams, on Flickr

    Went on my own this time.... the place I had to go was not far from Rev W Awdry place so that was nice to see.

    An uneventful trip up left to this coming home in my trailer...

    [​IMG]DSCF8064 by Stephen Williams, on Flickr

    The chap had a nice few Stuarts at home, there is another N marine about.... and many more at another location including H2 and H diesels.

    I was expecting a bigger engine, it's smaller than a d something like Corborn size I suppose.

    [​IMG]DSCF8065 by Stephen Williams, on Flickr

    [​IMG]DSCF8066 by Stephen Williams, on Flickr

    [​IMG]DSCF8067 by Stephen Williams, on Flickr

    The throttle rod is a bit Heath Robinson for Stuart if you ask me.

    [​IMG]DSCF8068 by Stephen Williams, on Flickr

    [​IMG]DSCF8069 by Stephen Williams, on Flickr

    Updraft Stuart Carb

    [​IMG]DSCF8070 by Stephen Williams, on Flickr

    Nice flat pulley.... guess I need something to run off it now.....

    [​IMG]DSCF8071 byStephen Williams, on Flickr

    Impulse coupling which isn't catching.

    [​IMG]DSCF8072 by Stephen Williams, on Flickr

    Magneto bracket looks similar to P3 and W2?

    [​IMG]DSCF8073 by Stephen Williams, on Flickr
  5. Skankin_giant

    Skankin_giant Well-Known Member

    Back "home" I decided to look at the lack of compression.

    [​IMG]DSCF8074 by Stephen Williams, on Flickr

    Valves move well and no oil leaving past them.

    [​IMG]DSCF8075 by Stephen Williams, on Flickr

    More pics of the carb.

    [​IMG]DSCF8076 by Stephen Williams, on Flickr

    [​IMG]DSCF8079 by Stephen Williams, on Flickr

    Not another split crank.....

    [​IMG]DSCF8080 by Stephen Williams, on Flickr

    Top end off!

    [​IMG]DSCF8081 by Stephen Williams, on Flickr

    Cylinder head.

    [​IMG]DSCF8082 by Stephen Williams, on Flickr

    rather lovely lump of a cylinder.

    [​IMG]DSCF8084 by Stephen Williams, on Flickr

    Bore seems fine.

    [​IMG]DSCF8085 by Stephen Williams, on Flickr

    Back on.

    [​IMG]DSCF8088 by Stephen Williams, on Flickr


    [​IMG]DSCF8089 by Stephen Williams, on Flickr

    I thought I took a picture of it back together but must have forgot... but it is together and with improved compression.
    Will look into the ignition next.
  6. Skankin_giant

    Skankin_giant Well-Known Member

    Needs improvement but it's a start...

    Running very hot at the start, the ignition was set for the impulse but that wasn't working so I altered it a bit later, I've not got a video after further changes.


    Gutted I deleted the start up clip, sort of exploded into life and disappeared in a ball of grey smoke.
  7. Skankin_giant

    Skankin_giant Well-Known Member

    Just incase anyone is wondering (probably fed up of me....) about how massive this Stuart is here is a photo next to a 20L Jerry can.

    [​IMG]DSCF8112 by Stephen Williams, on Flickr

    And next to it's stable mates......and other junk...

    [​IMG]DSCF8114 by Stephen Williams, on Flickr

    Cheers, Steve
  8. Victoria

    Victoria Member

    Not at all "fed up" Stephen, its all good interesting stuff and excellent photos as well.
  9. Skankin_giant

    Skankin_giant Well-Known Member

    Glad it is of some interest Eric.
  10. campingstoveman

    campingstoveman Active Member


    You should look at the other forum, it's become an ST appreciation club :twisted:

    Martin P
  11. admin

    admin New Member

    Interesting engine and enjoyed the pics.

  12. Skankin_giant

    Skankin_giant Well-Known Member


    Thanks to Nick the K is going again, took 3 days of a hour here and there to get it to even look at starting...

    The replaced impulse couple while better than it was doesn't seem to engage on the peg, is there something that can be done there? Would seem it need a spring to hold it out.

    With the new coupling the the timing is much better and the engine runs at a far more sociable pace! Though I did need to open the points gap as wide as it would go, after that if fired right up....

    I have done video, typically I left the video camera in the car and I took the van.... but the new phone does 4K video apparently.... if any good they will take far long to upload at work so will wait until I'm home.

    Exhaust is getting hot enough for the Leidenfrost effect to happen! Also it is igniting the fuel one the ignition is cut... had some nice blue flames out of the exhaust... I did with a full Lister A exhaust today so fingers crossed that will prove a better combo, if not I'll have a Lister A exhaust for sale.....

    So thats a positive, was hopping to get it out to a spanner day today but got stuck in work because of two loafing shift works I had to rise from their pit and give a bollocking to.... so was in work too late. Not that I'm bitter....
  13. Skankin_giant

    Skankin_giant Well-Known Member

  14. petternut

    petternut Administrator

    Getting there Steve. Do the valves rock at TDC?
    Its certainly interesting and unusual though to my eye it looks more grown than designed.
    The impulse arm should not be sprung in any way but they don't work well if either pivot pin or arm are worn (or excessively oiled or worse still greased).
    I have boxes of Wico A bits and am only a few miles East of the M5 up the A30 if you're ever stuck for a bit.

  15. Skankin_giant

    Skankin_giant Well-Known Member

    Thanks Roland, it would seem it's doing enough, had more of a play today, I think the pin is a bit worn and that is causing the issue.
  16. Skankin_giant

    Skankin_giant Well-Known Member

  17. petternut

    petternut Administrator

    so now you have to sign in to view youtube - bye.

  18. Skankin_giant

    Skankin_giant Well-Known Member

  19. Skankin_giant

    Skankin_giant Well-Known Member

    Managed to get out and enjoy the sun for a few hours today, brought my John Cherry pump in to see how they would go together. Long term plan is to get a Stuart Turner pump for it as the gearing down from the drive pulley to the the pumps pulley would be near 4:1 so depending how fast the engine is running at the moment (rated at 1500) it would gear it down to 375rpm which should look quite nice with the view of the Stuarts pump crank.

    Anyway here is a vid, it's not running to great, perhaps the exhaust is too large for it? But it's not happy somewhere, keep farthing back through the carb.

    I can see what is said about them coming back with head problems, they get bloody hot!

    So this will be my rig for a few rallies, 1st one in May. Need to tidy up the pump really and give the engine a good clean..... wold have liked to have showed at IF but Cristin wasn't up for that idea... though we are looking at camping and visiting.
  20. Skankin_giant

    Skankin_giant Well-Known Member

    After having a accident unloading I thought it best to pick up a set of wheels for the K rather than break the engine or myself.

    Got these wheels home today and they are well made things they are too, looks like a blacksmith job on the axels I could probably mount them on the H1 set fine!
    They are a bit wider than I realised but will give me the opportunity to mount the engine with a pump in one unit.
    I'd like to find a Stuart Turner piston pump to go with it but getting one local seems like it might be a hard task. The big drive pulley on the Stuart pump would go well with the small pulley on the K, would gear it down nicely and the A4 type pumps do like nice at a slower speed. Will keep an eye out for other pumps but don't want to spend a fortune.
    I've cleaned up one axel and coated it in oil for the moment, the 2nd one needs my saw which is in work.

    I did get the K out to two rallies this year, and it ran ok for both though compression issues on the 1st rally and the engine cut out on the 2nd rally....massive carbon build up on the plug.... I think it need to come a part again with the valves out for a check over.

    Cheers, Steve

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