I ran a Saito 150 on a Giant Big Stick that was breaking in this engine. I used a 2000 MAb battery@6V, for the RX.
It started great, went through all the breakin procedures, and ran one tank of fuel through it at slow Idle ect. The fuel tank I installed was quite large, about 20-24 OZ, cuz Saitos love fuel.
I ran the engine for about an hour following their breakin rules. , slow, medium, fast, back to Idle, no more than 4K rpm's at breakin.
Then I ran the engine medimum , and full, very rich, and varied the times.
After the breakin I looked at the voltwatch, and it was in the Orange, not good. I measured the Battery at 3.4 volts??? This breakin only took an hour, and yes the RX Bttery was fully charged according to the Voltwatch. I did not measure the voltage with the Sentry meter before this took place. So I did not fly the plane, and wanted to get opinions on what could be wrong.