Forum Replies Created
-
AuthorPosts
-
January 16, 2014 at 6:44 pm #5175
vhgmcbuddyMemberThanks for the advice Geoff.
From what you have said, my timing is obviously way out. The points currently start opening at TDC, so if am understanding what it says in my Wico Series A manual, the impulse coupling will then retard the spark by whatever the lag angle is set at, so this will mean that the impulse spark is some degree after TDC, which would explain the complete lack of thump, thump, thump noises coiming from the exhaust!!!
My next question is, how do you advance the timing on a Wico Series A? The manual I have tells you how to adjust the lag angle, but when it comes to timing the advance spark it states “The magneto is coupled to the engine when the points are just opening” The problem is, the sprocket on the mag can only be fitted in one specific location, i.e. you can’t loosen the sprocket and rotate it a bit on the magneto shaft. Also, the sprocket on the engine is keyed to the inlet valve gear cam, so this can’t be adjusted. I have tried removing the magneto drive chain and then rotated the magneto by one tooth of the sprocket and then refitted the chain, but this results in the timing being way too early.January 16, 2014 at 6:05 pm #5170
vhgmcbuddyMemberIve cleaned the spindle holders, a Mate let me have some Pro rust to try , it got the loose bits of. When cleaning I noticed the worst damage was the sides subject to the full force of the grass being thrown at them, the other sides being sheltered not to bad. See photos 1 and 2, with this in mind it would have been an idea to turn them around a few years back. Coated 2 and 3 holders with etch primmer and will over paint with hammerite. No 1 will get a smearing of grease, end of this season I will see whats going on under their. I recon this being a side discharge No 1 holder wouldn’t get the blast but 2 and 3 on the one side would get the waxoyl I used blasted off with grass.
January 15, 2014 at 9:25 pm #5162
vhgmcbuddyMemberone way is to clean totally and apply araldite rapid to mating surfaces. but there will be other ways . Lovely piece of working transport. there is a following on the forum,so you wont be alone.
January 15, 2014 at 8:53 pm #5158
vhgmcbuddyMembersteve,what a find. cannot help with id but when I was at school I remember we had at least four pitch markers always behind the score box.not sure if you are a working clothes type or not ,but I think it will come up as new if you get stuck in.
January 15, 2014 at 12:56 pm #5152
vhgmcbuddyMemberWell as Newark is my favourite Show I am looking forward to it.
January 14, 2014 at 9:12 pm #5133
vhgmcbuddyMemberJanuary 14, 2014 at 8:23 pm #5132
vhgmcbuddyMemberhi Angus. this is the one discovered under a pile of coal in a cellar,amazing how its survived.
January 13, 2014 at 12:38 pm #5116
vhgmcbuddyMemberwhat is the best way to re=attach the friction segments to the plates on the Albion clutch
January 12, 2014 at 9:37 pm #5107
vhgmcbuddyMemberHi Hortiman yes I think you are correct.
I think the idea was that the surface area of fuel was less to slosh around than a tank mounted horizontally and the tyres on the outside gave a large footprint and extra grip over the roller models.
Some of the Villiers engines were also fitted with a sump adaptor to increase the amount of oil for continued use on banks.If any members need any info or parts I have lots of detailed drawings on the Hayter 26 and would be happy to copy and post
January 12, 2014 at 8:25 pm #5105
vhgmcbuddyMemberYes Two Days.
January 12, 2014 at 7:33 pm #5102
vhgmcbuddyMemberHello
Is it over two days?January 12, 2014 at 7:09 pm #5099
vhgmcbuddyMemberI have now had the magneto professionally refurbished. It has been fitted with a new condenser and coil. The original condenser was found to be completely shot and the coil was way past its best. According to the test results following the rebuild, the minimum rotor speed that the mag needs to produce a consistent spark when cold is 138rpm (so 276rpm engine speed). After heating to 50 degrees celsius, the rotor speed needs to be a minimum of 170rpm. The spark remained consistent all the way up to 3000rpm.
So, I fitted the mag back to the Norton and after 20 minutes of pulling on the starting strap, it did eventually fire, once!!! Not to be detered, I continued pulling for another 10 minutes before it sputtered into life, albeit for only 5 seconds, but I’ll take that as a victory!!!!
I have set the timing so that the points begin to open at exactly top dead centre, as I believe this is normal practice to make starting easier (allegedly!!!). Would I be right in thinking that the quoted figure of 3/8″ before TDC relates to once the engine is running normally and that this is achieved by adjusting the lag angle. According to the Norton engine manual 3/8″ equates to 28 degrees, so is this what the lag angle should be set to?
Now I am confident that the mag is working as it should, I think the carb needs some adjustment. The carb is an Amal 225. I have read previously on this forum that the main jet needle should be wound in until fully seated and then wound out by one and a half turns, which I have done. There is also an air adjusting screw fitted at the air intake end of the carb, running parallel with the body. Does anyone know what position this should be set in?
Finally, I was testing the engine without the air cleaner connected up, so could this cause the engine to get too much air and make it difficult to start?As usual, any advice on the fine art of magneto setting and carburetion would be greatly appreciated.
Cheers,
Sean
January 12, 2014 at 3:17 pm #5092
vhgmcbuddyMemberGood lot that, you must be chuffed.
January 12, 2014 at 2:55 pm #5091
vhgmcbuddyMemberNice find mate, well done
January 12, 2014 at 2:10 pm #5079
vhgmcbuddyMemberWas that the stuff that was on our favourite auction website mr haggle ??
-
AuthorPosts




