Right! Some progress. The reason I took off the cover for the fan housing the first time was the star adjuster was frozen, and it was easier to slide the spring down the screw adjuster by unhooking the far end. Also wanted to see whatever mechanics were near the blower wheel. Took Ray's suggestion and worked it through the cover flap this time. Could play with things longer this time as was VERY cautious about overheating with the blower cover off and only ran the machine long enough to flip the breaker and check the results during my first attempt at this. Firstly I soaked the adjuster screw in WD40 and rocked it back and forth till it freed. Was cautious as someone has chiseled one of the star legs off attempting to turn it. In my second pass I found that my memory of what I had done and difficulties was slightly off base. Setting the spring to mid point on the star adjuster screw resulted in too LOW an RPM value with the cable all the way in to be able to adjust it back up to the 1600 RPM / 53.333 Hz value called out in the manual. It drops so low it didn't excite and start. With all the discussion about idling the machines this seemed untenable. I adjusted the low speed adjuster nut to the end of the cable and still way too low. Shimmed the cable back further with a cut flat washer. It now comes up to at least 45 Hz and generates, but that's still way lower than the directed 53.333 Hz. Still believe the cable is too long in some fashion. With the spring set to the same mid point, the High speed adjust would only come up to 71 Hz, not up to the 75 Hz 2250 RPM called out in the TM. This SEEMS to be something other than the high speed limit, as further adjustments outward do not result in further increase in RPM. It looks like it might be related to the rotation of the governer arm. I've checked that it's not hitting on the oil cooler hoses that pass by there, but something in the geometry changes at that point where further adjustment doesn't result in more RPM. It's not the engine limiting things as with the spring set higher, both the low and high speed numbers are achievable. BUT if I accept a 45 Hz to 71 Hz range with control all the way in and out, (with the low speed adjustment shimmed) the load performance seems better. My load is far from a full load, and I might be fooling myself as a result, but it seems to hold better. With the starting / unloaded Hz set at 61-62, the set drops to 60 with my approx 2Kw load applied. On removal of load it returns to 62 Hz, but gallops or hunts for approx. 5-10 seconds before stabilizing at 62. The range of the hunting is only a few Hz. Given it's starting to hunt at this point, further lowering of the spring on the adjuster will probably further de-stabilize the unloaded condition. I won't be able to adjust the low speed up further without some other cable adjustment. Before I touch another thing I'm going to build a 5 KW load bank out of a 240 Volt dryer element and a high speed fan off of EBAY, and verify performance at full load.
making up one of the cable adapters and I went to GMG to see if I could find the diameter of the cable ( .063" ) and I noticed 2 pictures of their kit. Apparently its the 10/32 bolt along with a yoke/pin type clevice to attach to the governor linkage. Guess I should look at the linkage before I go too much further. I'll probably need to get or make up a yoke too.
