Working on an MTH S2 - 20-2500-1 circa 2004
There is only one smoke resistor and it is broken.
I searched the MTH site but no luck on the part # for this piece.
Is this resistor the standard MTH 16 ohm or a different animal?
Thanks
Dave
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Search Marty Fitzhenry here on the forum and he most likely can get you lined up on what you need. He's the best MTH service tech out there and always willing to help you get back running.
No it is a AI-0000060 8 ohm smoke element for single small units. I am not Marty but stayed at a holiday inn so I know this number is correct
. G
Thank You for the information George 
I was getting an 8 ohm reading but because the resistor was broken in two (and I have little experience with these smoke units) I wasn't sure if I should trust the reading.
Is it safe to assume that in MTH O guage there are only 2 smoke elements used - 16 ohm and 8 ohm ?
Will now go ahead and rebuild this smoke unit.
Dave
Yes, Only the single element small smoke units in some Steam switchers, small diesels, some electric use it. Hence the PS-2 3V boards that needed special flash boards so the single element was not over taxed with too much current. A regular PS-2 3V board should not be used as a replacement because of this issue. They used different code for smoke. G
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