My "77 Merc 1750 has the tilt/trim pump that has the reverse lock solenoid on the bottom of it. The solenoid does function but the reverse lock/tilt doesn't work right. It has the valve with the "T" handle that is supposed to be turned full CCW to engage the reverse lock or full CW to disengage it. It says on the pump not to run the boat with the lock disengaged, however if I engage it the tilt won't work at all so I have to run it disengaged. The tech said these systems are bad for that. He has the same system on his bass boat and it doesn't work either. He said he has only seen a few that actually do work. Mercury only used this system for a couple of years because of this problem, according to him.<br /><br />My questions, after all that are, (1)Can I use a newer type of tilt pump on this motor without having to change the mid section and rams? (2) Just how does the reverse lock on these work? It seems to me that it is supposed to lock pressure in the rams so they can't move, which will prevent the motor from lifting when in reverse, correct? My manual doesn't explain the reverse lock system at all. And finally (for now), (3) do the newer systems have a similar, but functional, reverse lock on them?<br />Thanks
