K. Smith wrote:


Eventually, BRP took the boat into their shop to diagnose the problem.
They came back in a week with the engine fixed, and claimed that the
rattle was the result of fuel starvation in the #1 cylinder caused by a
pinched fuel line. They claimed that the fuel line was kinked because
Twin Vee used a poor grade of fuel hose when they installed the motor.
BRP replaced the fuel hose, and the motor ran fine.


May or may not mean anything. What *else* did they do during the week
they had the engine besides replace a fuel hose with an internal
"pinch"? If anything?

It would be easy to do a quick rebuild on the #1 cylinder and then
return it with a story that there was a kinked fuel hose. "Look! We
replaced the fuel hose ((and secretly rebuilt the cylinder)) and it
runs fine!"

Or, if they admit rebuilding the cylinder and they blame the cause on a
constricted fuel supply line that isn't definitive, either. The rebuilt
engine ran fine when initially started up- but did as well for the
first umpteen hours on the (allegedly) constricted fuel line.

It's probably wrong to insist that skullduggery is the only explanation
for the restored performance of the engine after it was returned, but
it would be foolish to rule out the possibility entirely. More
information needed here. It would be interesting to know whether the
engine returned from the repair shop continues to run well, and for how
long.

It isn't insignificant that of two identical engines only one developed
a problem.