Peter, the engine tag says BS649 and I used that number to find the link above. The info on that page seems to indicate that this model stops at 2200. In the Mercedes industrial diesel line there are probably hundreds of variations in a single engine. I know that the OM352 (5.7 litre direct injection diesel) went from about 60 hp to 300 hp and had just about every torque and fuel curve you could imagine. I would guess Listers maybe similar?
Jason
BS649 is a standard that engine builders such as Lister used to show that their quoted bhp figures were consistent, and the engines were tested to a known level of amient temperature, fuel quality, accessory level etc etc.
I haven't got an HR3 book to hand, but the following figures from the SR3 might illustrate the point:
Max gross bhp: 28.2
Rated CONTINUOUS bhp to BS649:1958
23.25 @ 2500
19.50 @ 2000
18.00 @ 1800
15.00 @ 1500
12.00 @ 1200
9.00 @ 1000
The engine is rated at the above, plus they will deliver 10% higher power (overload) for one hour in twelve consecutive running.
The BS649:1958 standard will include all cooling fans, dynamos/alternators etc., but the main point I was trying to make was that the max rpm is probably higher than the 2200rpm you are looking at.
The guy in Alaska has been in touch with me in the past re spares, but he has only air-cooled parts available, not surpising seeing his location!
Peter