Wallfish 698 #1 Posted April 22, 2020 Had this "gearbox" straight shaft around for a while. Pretty rare item since this is the only one I've seen so far. I wanted to put this on one of the early engines for a display of a model L setup. Unfortunately it uses the old cork style clutch which need the taper shaft with the 2 key ways in it, and the engines I have don't have the key way slots, just tapered. Of course I completely went through the one engine first before noticing that. The engine had a completely round 1/2" shaft on it, without any flat. Don't remember ever seeing one of those before either but maybe they could be more common. Had it apart to clean anyway so just thought some pics would be good. Serial #0001826 4 pmackellow, factory, Fishnuts2 and 1 other reacted to this Share this post Link to post Share on other sites
CNew 404 #2 Posted April 22, 2020 Very nice! The more I look at this the more I like it, that’s a really cool way to house the clutch. Love the engineering... Any idea what sort of application this might have been used for? Thats a really nice looking engine as well! Share this post Link to post Share on other sites
factory 487 #3 Posted April 23, 2020 These very early engines use different shafts to the later ones, I do have one very incomplete parts engine of this age, I will need to check which shaft it uses. I also have an early Model L, sadly missing the rear section of the clutch housing. David Share this post Link to post Share on other sites
Wallfish 698 #4 Posted April 23, 2020 20 hours ago, CNew said: Any idea what sort of application this might have been used for? Yard Arm At least hoping so and still looking for the rest of one. Or maybe I'll use it for a Popular Mechanics Micro mini bike build All of those different gearbox setups could be ordered as is so the application was up to the company or even the independent tinkerers. 48 minutes ago, factory said: I also have an early Model L, sadly missing the rear section of the clutch housing. Don't remember seeing that before. Share this post Link to post Share on other sites
factory 487 #5 Posted April 23, 2020 The Yard-Arm uses a Type 184 (radial mount) engine, the clutch drum in that engine should have a keyway in it for the drive shaft, the Yard-Arm parts list doesn't give the part number for the rear housing but it looks different as it has to fit the drive tube, that said unless one appears we don't know if there could be an older version that uses a different engine Type. The Model L was one of the standard engine range, available for anyone to buy & fit to whatever tool or application they could think of, the Type 99 & Type 199 are the later direct drive engines with clutch. I have since acquired a Type 106 engine with the clutch assembly fitted, no idea if it's original yet (engine is sn 052178). David 1 CNew reacted to this Share this post Link to post Share on other sites
factory 487 #6 Posted June 3, 2020 On 4/23/2020 at 8:35 PM, Wallfish said: On 4/23/2020 at 7:41 PM, factory said: I also have an early Model L, sadly missing the rear section of the clutch housing. Don't remember seeing that before. While I was moving engines & parts around to retrieve the generator section of my current project, I found the box with the incomplete Model L (sn 006403), as I suspected the clutch for this early engine doesn't use the keyways. David Share this post Link to post Share on other sites
