Which locomotive uses this smoke unit ? Lionel 691-SSMU-F
Original Post
Replies sorted oldest to newest
As I recall that's an early so called "smart" smoke unit. Used in several mid-2000's puffing steamers, pre-Legacy. Used with an 8VAC regulator that is controlled by the R2LC to vary smoke intensity according to engine load. Typically used a 6 or 8 ohm resistor. Lionel's first departure from the old 8057-200 fixed non-puffing smoke unit, that typically used a 27 ohm resistor, and made anemic smoke.
Lionel was playing catchup to MTH at the time. MTH had introduced awesome puffing smoke with PS-2 engines in about 2001.
Rod
Will it fit in an older TMCC engine with the old 8057-200? Is there a better upgrade to the 8057-200? I would like more smoke.
I am looking for a new spare smoke unit for my 2008 Lionel model # 6-11149 Big Boy. And my 2006 Lionel Post War Celebration series 773 locomotive. I am an old Post War guy myself. I am use to tearing down locomotives like the 736 and the 2046. I am not familiar with the Command Control and Legacy locomotives, and all the electronics. I see this Lionel 691-SSMU-F smoke unit for sale, I was wondering if it would be the same style as my Big Boy. That says it takes a 6 ohm, and is unavailable through the Lionel web site.
Many years ago Lionel had a feature on the parts look up site that would show what items used a certain part, they turned it off so you can no longer do that. This is a perfect example of why it would be useful - to see what products used said part. Maybe some day we can get them to enable it again.
Jim
Yep Jim, that feature would be great to have nowadays!
Yes that is a very useful feature, I wish it still worked. Horizon Hobby did the same thing recently, when they updated their web site. Now I cannot tell what part is used or shared in which airplane.
@Richard Whipkey posted:Will it fit in an older TMCC engine with the old 8057-200? Is there a better upgrade to the 8057-200? I would like more smoke.
The 8057-200 will make awesome smoke with a few easy tweaks. No need to replace it. First thing is trash the 27 ohm resistor and replace it with an 18 or 20 ohm. You can even replace it with an MTH 16 ohm, though that can be a bit much. Ditch the fiberglass sleeve around the resistor. Then open up the air intake hole to about 3/16". Trim the gasket to match. Then repack with new wadding or Tiki torch wicking if you don't have the Lionel wadding.
You will be very pleased with the results. 
Rod
I'd suggest not going lower than 20 ohms, any extended running with lower values risks cooking the smoke triac on the R2LC.
