1999 merc 90/65 jet loss of power

[Hammy55usa]

When I go full throttle I get a second of full Rpms then it's goes down to about 1/2 rpm and maintains there. Any ideas of what may be the issue?

 

[Texasmark]

When I go full throttle I get a second of full Rpms then it's goes down to about 1/2 rpm and maintains there. Any ideas of what may be the issue?

Run up to the discussion on a 1996 90 hp Over rev limiter question that I just visited. Read the results from the respondees and you have some inputs for a possible answer to your problem.