Thanks Bob and all you guys for all the info .
I didnt know jett engines eat fuel before you open its box . Kind of pre-break-in ???
It is not really a break-in period. Should not be considered as such.
A new Jett engine owner still must follow the break-in instructions provided with the engine.
Dub runs all of the engines for three main reasons.
1) The engines are very tight when new. If the rod is going to break, it will break on the first startup when the engine is tight and cold.
- Usually they do not break, about 2 a year - but its better to find out before it leaves the shop.
2) Dub takes the engine up to full power on his "standard" prop to verify the performance.
- If it does not perform to specs, it does not get shipped.
3) Dub sets the idle mixture. Jett's low speed mixture is different than most, and this is an important step
- End user may have to make tiny adjustements (1/8 turn or so) as the engine runs over time, but no more than that.
The break-in period required at the engine owner's end is important for 2 reasons
1) It gives the engine run time under controlled conditions, at the right rpm, under a ligher load, and thus slightly rich.
2) It gives the engine owner the opportunity to understand how the engine runs, baseline rpm numbers, and a point of reference.