Wade - We traded a '90 R50 for an R52 last year. We never had a lick of trouble with overheating of the Deutz engine - have Cummins now, it's a beast, but if we had a choice, we'd have stuck with Deutz. Double check your fins to make sure they aren't clogged with dust_straw. Clean oil cooler very well - they rely heavily on oil to do cooling and a plugged oil cooler just may cause her to get hot (engine, not your wife!). Plugged oil coolers are a common thing on these. Fan may so need replacement. With apologies to the AGCO dealers on here, I'd also look elsewhere for Deutz engine parts - have heard they are much cheaper through other channels. You can also get long straw from that 50 that compares very well from straw out of your l2. We went from an M3 to that R50 - learned some tricks and soon where producing very similar straw to a conventional. Make ABSOlUTElY sure there are NO reverse bars on the rotor - they are murder on straw and horsepower. Replace them all with forward bars. We also have found that running at full capacity will make longer straw - keeps things moving through faster. When we hit areas of short grain or downed grain and can't keep our machine running at full capacity, it will break straw up more than normal. Don't be afraid to make that 50 earn her keep! Any of the other mods discussed here (extended bars, helical work, etc) will result in longer straw too - anything to make material move through in an orderly fashion instead of bunching up or tumbling around in there. Trust me, quality straw can be had behind a Gleaner rotary with very little tweaking. Click on the link below to see a pic I took last winter of the straw we were using from our 52.