Lawn Masters
Addicted to ArboristSite
This is why I like the metal tags riveted to the crankcase with the serial number and model numbers stamped on them.
No. Just the last models. The Partner famely's were often many models, from bacicly the same saws.This you know.Saw Man said:Mike Acres,
Some cereberal cob webs clearing. Only some.
R 85/100 cc shared all parts but the cyl/piston just like the P series.
Pics show a button hole plug in the cover.
R 85 or 100 cc she is, but didn't all the 40's have Decompression Valves????????
Jonsered was first here at least, with two piese ingnition.Saw Man said:Some info you might enjoy.
Thryistor was Partners name for a new type of tranistor ignition system that was one of......if not the first industry spilit (two piece) ignition systems back in 'those days'.
Here it was a welcome change. It meant less problems, and the cost was really not more since the sytems needed less effort, and service.Saw Man said:Major drawbacks of electronic systems in 'those early days' were they were not: debugged very well, dealers had very little solid state experience, coil & electronic parts were built into one piece....so if a electronic part failed the whole thing had to be replaced. Really pissed of alot of people.
The position itself cooked a lot of coils. that is why it was moved. Jonny red had the same problem with the coils that was in the top cover.Saw Man said:Many coils were fastened to the left side of the cylinder so the cylinder heat and coil heat both helped kill many one piece electronic ignitions.
Users & dealers often killed ignitions themselves....unknowingly by not properly grounding the "sparkle "plug. Since it's alot easier & faster to pull the starter rope, after "X" amount of pulls, enough field voltage was produced that capacitors-diodes would leak (blow) thus weakening & eventually ruining the ignition.
Thease are two diferent systems.Saw Man said:Transistor (Thryistor) had less tendency to blow but was more expensive, and the two piece by Partner was a major selling advantage....in 'those days'.
Mike Acres said:I can see this is going on for a long time.
Partner introduced electronic ignition in the R-14T in 1966
Which model of Jonsered do you figure had the first Electronic ignition or are we only talking about two piece systems?
I have the Jonsered 70 as the first electronic model in their line.
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