I currently have a 1978 19ft dynaglass boat, not a cc , closed bow (storage only, not nearly enough room to be a cuddy)... It's currently got a beat 1988 comm Johnson 150 on it... compression terrible some cylinders 60 I think one may be 0 ... Used it all last season like thAt ... Went good actually 40 mph right to a plane. I want to replace the motor dealers got a 1998 90hp Johnson .. Said this should do fine on my boat... It's also 120 Lbs less then my current motor. I want to be able to plane out and get about 30 .. Is this possible ? Any ideas? This motor is $1800.00 prop, controls, installed 60 day warranty...