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About Wristpin
  • Rank
    Advanced Member
  • Birthday September 5
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  • Gender Male
  • Location Romney Marsh, Kent
  • Interests Most things mechanical!
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  1. The lead that you describe as going to the throttle is the “ kill / stop” wire and could be the cause of your loss of spark. Make sure that it is not earthing out . You don’t mention a condenser so you probably have a coil incorporating one. I am fairly certain that your engine is an early A98. - aluminium crankcase, 98cc - as the later ones and the 112cc and 114 cc aluminium engines that followed had electronic ignition - no points.
  2. That’s a bit of a mess in the carb and governor department! Have you checked for a spark straight off the end of the plug lead with the cap removed? Also , with no sign of a recoil unit , how are you spinning the engine? May be just not fast enough, or is the clue in that drill lying on the ground? May still not be fast enough. Can’t see from the images but is there a wire from the magneto to an insulated terminal on the carb. If there is, that is the kill wire and it may be shorting out. When you were in the mag replacing the points did you notice a condenser ? If there’s no separate condenser it may have the later pattern coil incorporateing a condenser and the whole unit may have failed but before going that route check that the plug lead is firmly screwed into the coil . An image of the mag with the flywheel removed will be useful.
  3. Aspera/Tecumseh query

    Re the head gasket. Been there and had the identification issue in the past. This may be of use https://www.dropbox.com/s/mgrbup9j4y4ii6f/P1010221 (Medium).JPG?dl=0 EDIT:: Doesn't look as though it will as yours is not on there - chart too modern , I think. I've had a quick look through my box of left over gaskets and part used sets - no joy there, but will have a more in depth look later. Are the fins on the cylinder head straight or curved ? Just had another rummage and this looks a possibility. Got several! https://www.dropbox.com/s/ipwc0d40we4iuse/Tecumseh head gasket possibly0001.pdf?dl=0
  4. One of the first Westwood Gazelles

    Electric start. Sometimes the e start machines would have a recoil unit as well but on later higher horsepower machines the recoil was absent to allow for ducted cooling.
  5. Rotaped Tracks

    They were quite common in the 50s, the hay days of grant aided land reclaimation and drainage, fitted to Howard trenchers and tile drain layers
  6. Reversing a Lucas SR1 magneto

    The following is quoted from a manual on overhauling and testing magnetos. " Before working on a magneto connect a spark plug to the HT lead with the body of the plug connected to the magneto body. If this is not done and the magneto turned beyond its "spark point" the high voltage generated will find the easiest path to earth. At best this could cause tracking across the bakalite cover, creating a permanent problem, at worst it could destroy a perfectly good - and expensive to replace - coil." It goes on to warn of the risk of destroying a digital multi-meter if the rotor is turned with the meter connected. You have been warned
  7. One of the first Westwood Gazelles

    You are correct that GH was a Scientologist but I've never heard that it extended to the tin bashing side of things!
  8. One of the first Westwood Gazelles

    Certainly similar to that Atco but without researching some catalogues and Parts lists I can’t remember the distinguishing features that separate the re- badged Dynamarks from the later UK made ones.
  9. One of the first Westwood Gazelles

    The early Westwood’s were in fact rebadged US Dynamarks ( as were the first Atco tractors) . One of the distinguishing features was the rounded, pressed deck, whereas the first Westwood made decks were the angular, fabricated “threepenny “ bit ones. But , before that is used to date Westwood production , I’m reliably informed that early home built Westwood tractors used the rounded Dynamark decks.
  10. Aspera/Tecumseh query

    My workshop manual only shows side by side ports but does show both methods of valve retention, referring to the pin system as “early”. Not sure whether this helps or hinders! Edit 8/11/17 Just realised that in the Dropbox scans that I posted earlier , the Lauson H30 has the "90 degree ports" and the Aspera one the parallel ports. https://www.dropbox.com/s/k783cnjt6i95mx2/Lauson H30%2C Aspera H300001.pdf?dl=0
  11. Aspera/Tecumseh query

    Specs and torque settings. https://www.dropbox.com/s/y87xhox3a0mhqpb/Aspera specs and torque settings.0001.pdf?dl=0
  12. Aspera/Tecumseh query

    Sounds like progress. UNC into alloy castings is normal even for the Italian manufactured ones but the pattern of the recoil unit suggests a fairly early unit , so it could be of US mfg. Images may give a clue as to exactly what you have so the more the better. Move the thread if you wish but don’t split it . Split threads about the same machine are a pain - imo!! Meanwhile, assuming it to be an H30 I’ll sort out some clearance and torque figures.
  13. Aspera/Tecumseh query

    Its possible that your engine is an H30, not a BH but I will have a look at some books in the morning. Also wondering whether the blower housing / cowling that the starter mounts on is the correct one for the block - looks a bit of an uncomfortable fit. The images of the carbs are for vertical crank engines on rotary mower applications and not relevant to your problem. Edit I've not been able to match your numbers to any reference material that I have but here's a couple of scans of H30 models, one of the original Lauson version and one of the Italian made "clone". They both feature the stepped inlet manifold. https://www.dropbox.com/s/k783cnjt6i95mx2/Lauson H30%2C Aspera H300001.pdf?dl=0
  14. Adding images to posts

    There’s a thought, chance to get rid of one of the old paper ones from under the mattress!
  15. Adding images to posts

    Spot on! Never realised that there was a limit. Know that "rules is rules" but seems a bit hard as nearly all my attachments have been to help others!
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