MikeRuth
Posts: 289
Joined: 3/6/2006
From: Tarzana, CA, USA
Status: offline
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Well some follow up on my G2300 issues, I did inspect the engine and all is well.
I bought a Perry 5002 Pump carb and a VP-30 pump.
Kind of a chore to get that pump in behind the engine but it's in there. Was trying to maintian the suggestion of (1)keeping the vent hole down and (2) the nipples at or about the same height as the carb nipple.
the carb fit sunggly into the case, I figured that would happen as they spec the carb body about .0070 over what ST uses.
when drilling and tapping the back plate they nicely casted the word "CHINA" dead center, so it takes a mill end to grind out a small amount of that flush if you want to put the pressure fitting dead center. I see no reason why you could not mount it a tad below or above. The nipple protudes into the back a small amount and you have to caefully file that down smooth to the back plate. Install with lock tight.
I plumbed it with no return to the tank. So I am using a clucnk and vent only now.
Intital running with it proved a tad bit testy, I think that the factory setting is a bit low on the fuel flow, as I was coming up lean, so I turned the adjuster in a bit (2) turns and had a good top end, but not just right, then I moved the blue disc a bit toward the rich side and bamm it was so rich it wouldn't clear out.
Backed the regulator back out a turn and from there was able to start getting a high speed tune. Once that was set, I was able to set the low end. The disc setting is a bit touchy, but once set holds true.
On the next morning I was able to test fly it. The first flight proved to be so much better than with the OEM carb, but it was loading up a bit on the low end.
On the next flight I leaned the disc one click and it was better but still not quite there, loading up a bit on long down lines and slow passes.
on the next flight we hit it on the money, A steady 2100 rpm idle and 8150 on the top end with an APC 16 X 10 pattern prop, 15% powermaster w 18% oil and a Magnum 4 stroke plug.
I flew two more times, each over 15 miunets and never once did that engine so much as hickup.
I am to say the very least most satified with this combonation. sure I have now invested an additional $80.00 but in my book, it was well worth it.
I need to do another weigh in, but I'm guessing my all up weight right now at 10.25lbs. With the above combonation, it will climb straight up vertical as long as you want it to with no loss of speed. AWSOME.
large loops and other moves that require some grunt are just great now.
so in my book, this is definetly worth the expense if you can not maintain the suggested alignment and tank distance recomended.
Also since I nicked my APC prop I threw on a Zinger 18 X 8 to run it dry and just for kicks tached it, 7100.
Mike R
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RE: ST2300 Testing and Experimenting - 
