I'll start off by posing some questions one must consider and I'll end with some links to different manufactures ......
Size L/W/H
Name brand/Off brand
Warranty/None to several years/Hours
Manuals/Operator/Parts/Service/None
Air cooled/Liquid cooled
1-2-3-4 Cylinders/4 Stroke
Pull start/Electric start/Remote start/Wireless Start
On board 12V battery/Remote battery
Fuel tank/On Board/Remote
Radiator cooled-mounted/Remote/End/Lower (Bottom)
Generator-Brush/Brushless
Rating-Wattage/Standby/Prime
Speed-1800 Rev's/3600 Rev's/Variable
Engine to generator-Direct/Belt
GenSet Tube frame/skid mounted
Sound insulating enclosure/none
loading eye
Monitor pannel/plugs/circuit breakers/buddy plug
Low oil pressure warning/shut down
High water temperature/shut down
Exhaust-top/bottom
Muffler rating-none/residential/hospital
Service-single side/bottom/split
Mounting system-none/rubber/air bag
Voltage regulation-none/2.5%/1% No load to Full load
Alternator-none to 45 Amp/Larger option ?
Filters-spin-on/oil/fuel
Freon pump option
Method of mounting-below/at/above frame or in a storage compartment.
Now -- For some links:
http://www.wricointernational.com/
http://www.powertech-gen.com/ Several links within this site
http://www.generatorsearch.com/ Several links within this site
http://www.nextgenerationpower.com/ Several links within this site
http://www.southwestfastener.com/productsHonda.htm
http://www.northern-lights.com Several links within this site
http://www.westerbeke.com/ Several links within this site
As you can see -- It's not a "one size fits all"
I hope this is of some help -- for those of you that are contemplating a Diesel Generator .....
OLDphoneman Volvo/Alfa Gold Florence,Or.
http://community.webshots.com/album/49062992VBcrVd