Have a 1974 I believe 25 hp Johnson Model 25E74M Serial# C47280 on a 14 foot Springbok aluminum fishing boat. Motor has a 9x10 aluminum prop.<br /><br />Problem is that it seems as sometimes at WOT it does not seem to rev out. When by myself it seems to scoot right along, but if I have someone else with me the motor seems very sluggish with a very low top speed.<br /><br />The cavitation plate on the motor sits about 2 inches below the hull of the boat, should I raise the motor up?<br /><br />Or could it be that the motor is running too rich at high speed and when a heavier load is put on it<br />it loses its power?<br /><br />Thanks for all and any help.