I know this is non Y block related but it will be used primarily for diagnosing Y's. On another note, there is one on ebay right now with a buy it now price of $650.00, (item No. 140312622813) I gave a whole $25.00 for mine.

55 Vicky & customline

58 Rack Dump, 55 F350 yard truck, 57 F100

59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?

Pretty sneaky, asking a question about a non Y piece of equipment, then justifying it by saying it will be used to test Y blocks.  Obviously you have been associated with this group long enough to know we'll try to help with anything we can.

I have a 920 Sun, and my operator's manual says it is for 920 and 1120 machines.  I have a "Rastonic" model, which means I can display the firing patterns vertically as well as horizontally.  I don't often use it.  When I was working in the trade, the dealership had an 1120, then when I bought one for our shop it was a 1020.  The operation of these 3 machines is the same for all, the only difference I see is size of the 'scope and the meters.  Does the 720 have exhaust gas analyzer?  So I would think the info from the manual for any of the "20" series would apply.  The Sun number for my manual is 692-662, maybe that would help in your search.

John - "The Hoosier Hurricane"

I suspect the different models were made up of a combination of different components because each component sort of has its own data tag. I have written to all of the literature dealers in Hemmings and nobody appears to have anything on these machines. My machine does have a port in it for exhaust, I need to figure out what I am missing for hoses, connectors, sensors etc.

Do you have a scanner? if so, you wouldn't be so kind as to scan and email me some pages from your manual would ya? Most of the stuff I can figure out like the vacuum, tach, dwell and coil test functions, but I would like to know how to use the screen and superimpose the cylinders over each other blah blah blah, otherwise it may just become an ornament in the nostalgia garage I am building.

Again, Thanks

Bill

55 Vicky & customline

58 Rack Dump, 55 F350 yard truck, 57 F100

59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?

I have a scanner that I have never used, don't know if I can figure it out.  What email address do you want it sent to?  I can probably get some help from one of the grand kids.

John - "The Hoosier Hurricane"

If your grand kids would be kind enough to teach an old dog new tricks, you could send it to myrandci@fairpoint.net.

Appreciate any info I can get,

Have a great day,

Bill

55 Vicky & customline

58 Rack Dump, 55 F350 yard truck, 57 F100

59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?