I don't know about more diesels than gas, they made/sold a pile of gas RV gen sets in the 70's and 80's, but they did sell the J series for a long time. Before I was hired in '74, they sold enough small sets to run the overhead oven to bake the varnish on stators/armatures/windings. By fall 74 they shut down the overhead and all the baking was done in batches in the oven room. The overhead never ran again.
When I started at Fridley, the J block line was still against the south wall, IIRC, it was about 100 yds long and a raw casting was placed on the west end, and a finish machined block came out the east end. Very impressive.
Even though I worked for years on the L/A diesel development, putting all the development money into it basically killed the gas engine. If they had put some dollars into it to give it OHV and injection, things would have been more interesting. Though that likely would have just delayed things, as Cummins sure didn't want the small stuff.
And some trivia for Onanparts,
do you remember the Q and/or P series diesel engines? Not sure if they ever got in production,
the Q was a 1 or 2 cyl vertical cylinder air cooled to replace the small J series.
The P was a IIRC 4 cylinder flat opposed air cooled for the military.
Both of these were in development when we were doing the L/A's. We shared lab/shop space with them.
Edited by DL-North, May 15, 2016 - 08:11 PM.