Kostas,

 

Welcome to the forum as an active poster.  I bet we’ll have suggestions
that’ll help.

 

I’m not a mechanic of any kind but I have a couple of observations you might
start with.

 

Your static rpms are on the low side of the allowed range of 2110-2225.
That’s not consistent with a 7148 prop.  So, either the prop is not really a
7148 or your engine is weak.

 

1.      I’d urge you to check the actual pitch of the prop.  I’m sure that
there’s a standard procedure for this.  Your mechanic should know or one of
our members should be able to give a reference.

 

2.      For the engine to be canted 12° down, either it is the wrong mount
or it was bent (and not properly repaired).

 

Let’s watch for expert answers.

 

Don’t feel bad about your English.  You explained everything with excellent
clarity (better than many of us native English speakers do).  I wish I could
speak another language with a fraction of your ability.

 

Ed

 

Ed Burkhead

http://edburkhead.com/Ercoupe/index.htm            East Peoria, Illinois

ed -at- edburk???head.??com                      (remove the ? marks and
change -at- to @)

 

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