Revo Rancher
Hardcore RCTalk User
Well, finally got enough time and good weather to break in my Hyper 7 PCR RTR. This model has the Hyper 7 .21 8 port engine. I run the stock plugs and use Byrons 2500 (25%) fuel.
I followed the instructions on the settings for the carb for break in. If my memory is correct, they suggest 5 turns out from full in for the HSN, flush for the mid needle, and 4 turns out for the LSN. You the idle the rig for 3 minutes then shut off until fully cooled, engine at BDC. You do this four times. During this time I had good idle and it finished the sequence just fine. I had to replace the glow plug after this as it would not start for start number 5. I checked the glow plug on the glow plug igniter and it was completely dead. (Yeah, I checked the battery on the igniter, too)
Anyhow, new plug, fresh tank of fuel. Starts fine. Feed it throttle. It stalls. Start again, feed throttle, but even more slowly, gets moving. I can get it up to about 25 miles and hour after little bit of slow throttle for half a tank, but anytime I hit the throttle fat or try to reaccelerate after letting off the throttle it stalls. I lean it (turn HSN needle in) 1/2 turn. Worse now. Run it around until hot, then lean another 1/2 turn. A little better. Still stalls when pushing throttle too much. Lean another 1/2 turn. (HSN) By now, I am turned in more than the post-break in recommended setting of 4 turns out from all the way in for HSN. Still running better, but really spitting out tons of fuel and you can really hear it sputtering, like it is full of fuel. Now it is dark so I quit for the night.
Temps, BTW, are anywhere from 110 to 138 after running it around. Recommended per OFNA manual is 260, and 220 for long engine life.
Q: Should I lean the HSN some more? I do not think I am lean enough which explains my poor engine response and dumping of fuel, and the low temps.
I have two 2.5 TRX motors that broke in and run better than this!!!!
I followed the instructions on the settings for the carb for break in. If my memory is correct, they suggest 5 turns out from full in for the HSN, flush for the mid needle, and 4 turns out for the LSN. You the idle the rig for 3 minutes then shut off until fully cooled, engine at BDC. You do this four times. During this time I had good idle and it finished the sequence just fine. I had to replace the glow plug after this as it would not start for start number 5. I checked the glow plug on the glow plug igniter and it was completely dead. (Yeah, I checked the battery on the igniter, too)
Anyhow, new plug, fresh tank of fuel. Starts fine. Feed it throttle. It stalls. Start again, feed throttle, but even more slowly, gets moving. I can get it up to about 25 miles and hour after little bit of slow throttle for half a tank, but anytime I hit the throttle fat or try to reaccelerate after letting off the throttle it stalls. I lean it (turn HSN needle in) 1/2 turn. Worse now. Run it around until hot, then lean another 1/2 turn. A little better. Still stalls when pushing throttle too much. Lean another 1/2 turn. (HSN) By now, I am turned in more than the post-break in recommended setting of 4 turns out from all the way in for HSN. Still running better, but really spitting out tons of fuel and you can really hear it sputtering, like it is full of fuel. Now it is dark so I quit for the night.
Temps, BTW, are anywhere from 110 to 138 after running it around. Recommended per OFNA manual is 260, and 220 for long engine life.
Q: Should I lean the HSN some more? I do not think I am lean enough which explains my poor engine response and dumping of fuel, and the low temps.
I have two 2.5 TRX motors that broke in and run better than this!!!!
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