ORIGINAL: Javier-RCU
I begin to turn the prop by hand, but when piston is in up position, there is a lock something like a short stroke, then I need to apply some force to complete the turn.
From the owners manual (that paper thingy that many people toss aside and ignore
) on page 7:
With these engines, the piston will feel tight at the top of its stroke when the engine is cold. This is normal. The piston and cylinder are designed to achieve a perfect running clearance when they reach their intended running temperature.
I did put apart the cylinder head and cover plate and inside the engine seems to be new. When I release the cylinder head screws, this lock or short stroke disappear.
Why did you start disassembling a brand new engine? With many warranties, this could give the manufacturer an excluse to reject a claim for warranty work. I'm not saying yours needs warranty work, or that OS would reject a claim, but in general, it's not a good idea to disassemble a new product if you think it's broken.
There is something wrong with this engine, should try to break in or should to return to store?
Already answered by others, this is normal. I do suggest putting the engine back in the box and not touching it again until you've read the owner's manual.
