14 foot 1974 trihull with 1974 johnson 70hp<br />i have trouble getting the front end down so i have been toll to trim the motor up, when i do this and give it gas soon the motor drops back down. in the manual it says at 1500rpm a relief valve will automatically open causing the outboard to lower and that the outboard cannot be tilted while operating above 1500rpm. so how would this work to lower the front end at wot