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factory

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About factory
 
 
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  • Gender Male
  • Location Cheshire UK
  • Interests Stationary engines and vintage electronics
 
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  1. Tiny Tiger for Sale

    Looks very nice, looking through my saved pictures from ebay of the Tiny Tiger Model 5001-1 which I think this is (but it's hard to tell from the pictures), ones in this condition go for around $200-$250 or sometimes a lot more depending on the interest at the time, also advertising internationally on ebay can increase the price. Note the larger gas tank versions like this one are less common than the standard ones. Here is a thread from earlier this year showing how the tank can be resealed; David
  2. Tarpen/O&R hedge trimmer

    Nice find, those O&R powered Tarpen powerheads are quite hard to find. David
  3. O&R compact

    There are two main types of tank offered with these engines, an alloy base tank that the engine sits on, or a round steel can tank (some with an internal vent pipe to allow use at various angles). Some tools like the chainsaws and drills had their own special tanks designed for them. If this is the engine from your introduction thread here: Then the tank supplied with it would have been the round steel can type as shown in the diagram below. If you would like any pictures or measurements to help with making a replacement, let me know. David
  4. Smallholders Show display

    Another excellent display Paul. There was a fairly rare Petro Chug-A-Drill at the Stourport vintage steam rally last weekend, I didn't go myself but there is a picture on flickr here; David
  5. Alarming.

    Here is some data for the other two wires (from my 1993 RS components catalogue, I found nothing online & it seems to be discontinued), apparently this alarm can do nine different tones depending how the green/yellow wires are connected. David
  6. O&R compact

    Sorry, I should have mentioned the points cover under the flywheel, take the two screws out & remove the cover, the points are under that (as below). David
  7. O&R compact

    The gap between the coil and the flywheel should be .010", you can use a piece of card of the appropriate thickness to keep the coil in place against the flywheel magnets while the screws are being tightened, if adjustment is needed. First thing to check if there is no spark would be the points that are housed behind the flywheel, these could need cleaning and the gap checking (usually .020" but listed as .015" on the decal on earlier engines), if there is still no spark then you could check the wiring and the coil secondary winding resistance if you have a multimeter, though it's rare for the coil to go bad. I recommended you have a read of the carb rebuild thread if you haven't already, Webhead on here sells new carb diaphragms (also Wallfish has them too). And finally if you have the original air filter assembly don't forget to clean out the old crumbly filter foam from it. David
  8. Smallholders Show display

    Very nice display as usual. Here are a couple of pictures of a small selection of my O&R's that I displayed at the 1000 engine rally last month, the Tarpen rotary cultivator attachment was bought from one of the stalls there. David
  9. O & R Carb Repair Tutorial

    Here is what the manual suggests for getting the lower Carb screw out; This is what I have been using if I need to get the carb screw out without removing the adaptor plate or gearbox (but I usually do a complete engine rebuild instead and remove the adaptor plate or gearbox first). The first two pictures below shows a small flat blade screwdriver (being misused) that fits between the adaptor plate or gearbox mountings, you may need to remove the cylinder plate to gain access. And the last picture shows some other Phillips screwdrivers together with the flat blade one, to use these they would need grinding down to fit between the mountings, I don't want to do this to the orange Wera one but the cheapo one may get modified vandalised. Hope this helps. David
  10. Best fuels/ mix for tiny tiger?

    That is a very nice condition later Tiny Tiger with the larger gas/fuel tank. I will check the manual for mine, but I wouldn't recommend using a 350W load continuously, something like a 250W maximum load for continuous use would be better to avoid damage (which is what the early ones were rated for). Those starters can be tricky to repair till you get used to fixing them. David
  11. Best fuels/ mix for tiny tiger?

    Hi Richard, Thanks for that link, 1966 & 1HP makes more sense, the earliest O&R parts list I have mentioning the compact III (1HP) is dated November 1965, that doesn't imply that they didn't introduce it earlier that year of course. The information in the link seems mostly fine, I will see if I can find any more reference to the 16:1 ratio in any of my original O&R literature, I just checked a few yesterday. One thing I don't agree on in the link is the last comment " Used O & R model airplane engine " I think it should really say something like 'used O&R compact industrial engine' as the O&R Compact was developed as an industrial engine (although model makers did & still do use them for other things), here is something I found from an archive document relating to that; I remembered recently buying a parts list dated Apr 1964, hopefully this scan from it helps better with the (early) original ratios, I will edit the calculated 10.67:1 ratio to 11:1 in yesterday's post. Of course modern oils allow higher ratio to be used, as has already been said; David
  12. Best fuels/ mix for tiny tiger?

    I'm not sure where you found that information but there were no 1HP O&R engines in the early 1960's (only 3/4HP) and the only mention of a 16:1 ratio is for the much later 1970's 1.6HP Model 20A engine, there seems to be a lot of incorrect information around for these engines. Here are some old fuel/oil mix ratios from the various O&R manuals & literature I have, the ratio changed over the years; 1961 & 1962: 3/4 pint #30 SAE oil per gallon (11:1 ratio), these early compact engines where rated at 3/4HP. 1963: 1/3 pint #30 SAE heavy duty oil per gallon (24:1 ratio), again only 3/4HP compact engines available then. 1966: 1/3 pint #30 SAE heavy duty oil per gallon (24:1 ratio), for all 3/4HP, 0.85HP, 1HP compact engines. From the NIAE test report (published 1964), "the petrol/oil mixture has been changed to 24 parts petrol to 1 part oil and the recommended grade of oil is heavy duty M.S. type SAE 30" (was 3/4 pint to 1 gallon when they did the testing in Jan-May 1963) many design changes were made following this report. There was also a mention of chrome cylinder linings, here is the information I have for some of the O&R engines; 1963: Early compact engines had a steel sleeve cylinder with chrome piston rings (earlier information from 1960 doesn't mention the rings being chromed) 1975: Model 13B engine (1HP) has steel cylinder liner with special alloy cast iron rings, and to confuse things more the brochure (undated) for the newer Model 20A engine (1.6HP) gives a 16:1 fuel/oil ratio using either SAE 30AD or MS motor oil, these engines had a chromed cylinder bore. Forum recommendation for fuel/oil mix ratio; We have been recommending a 32:1 fuel/oil mix on the forum for using modern 2-stroke oils, I have been using a high quality mineral based 2-stroke oil from Stihl, another forum user had problems with the synthetic version of 2-stroke oil from Stihl, see this thread; Obviously you may need to experiment to find something suitable that is available where you are, but I do not recommend oils sold by petrol stations for use with scooters (tried some of that in a Villiers engine many years ago, it was far to smoky), the best stores to try and find something suitable would be a local store that sells & repair garden or ground maintenance equipment, chainsaws etc. Note the all the O&R compact engines & the newer Model 20A have seals made from rubber and also on earlier production engines they used plastic cages for the bearings, these can be damaged by certain additives in some types of fuel/oil. Also if you intend to store the engine for any long period it's recommended to drain all fuel and to put some oil down the spark-plug hole, pull the starter a few times to coat the cylinder & piston and leaving the piston blocking the exhaust ports. I must admit I don’t know if the fuel sold in the UK has ethanol in it, I guess that is something else to look out for which may or may not have harmful additives. David I forgot to add that you should check out the carb repair thread if you haven't already and it's a good idea to clean out any old crumbly filter foam from the air filter housing, it can damage the engine if any of it gets sucked in. David
  13. Unknown applications

    Just been looking through some of the archived magazine articles I have saved from the web and found this drawing of a very similar looking pump set to the one in above picture. It's from the June 1961 edition of Popular Science and is described as a bilge pump. David
  14. O&R Type 98 Engine

    Also I had a go at bidding on a another type 98 engine (I asked the seller what type it was as it looked unusual), I didn't win it but here are some pictures of it showing the externally threaded PTO shaft mentioned in the parts list, together with an adaptor housing I haven't seen before. The adaptor housing looks like was attached to something flat, also note the long stop switch wire. Anyone seen one like this before? David
  15. O&R Type 98 Engine

    I've had a better look at the parts attached to the PTO shaft of this engine, it looks like an adaptor kit for something like a propeller, which doesn't help with identifying the original use. But I have found a reference in a parts list from 1964 for an externally threaded PTO shaft (part no. 42-39) being used on the type 98 engine, clearly mine doesn't have one, but it could have been changed as someone has definitely had this engine apart, the screws for the induction housing have been shortened too, so it probably had an adaptor plate or housing. David
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