Hi All,
I've thoroughly scoured the previous posts on this topic. I've found a few that had the same problem, but I couldn't seem to find what the solution was. Here goes:
I have a 1979 MCM470 that trims up, but won't go back down. I am looking for a wiring diagram for the trim pump/motor. I need to know where to check for fuses and to make sure it is wired properly.
When trying to put the lower unit back down, the trim pump/motor runs (its audible) but sounds like it is a little sluggish compared to going up. So far I've pulled connections the cleaned and greased with some dielectric grease. Same results. My next step is pulling the whole pump/motor assembly and checking to make sure there isn't a clog or something somewhere before re-wiring.
The boat was my fathers, and for the last couple years my brothers who had access to it treated the boat poorly. I see they or somebody may have tried to fix things themselves under the engine cover. Many of the wires are cut and spliced together in a jackass fashion. There were even 2 wires cut, leading to nowhere, and 1 wire attached to the top of the pump - also leading to nowhere. Furthermore, through Google, I've read about a trim limit switch and trim sender. These wires run through the transom to points on the port and starboard sides of the lower unit. It looks like a Purple and a Blue wire from the wire harnes that used to run through the transom have been completely severed. Will this prevent the operation in the down direction? So far it doesn't affect the up direction. If this is a cause, how do you re-run those wires, do I need to remove the entire lower unit?
The p/n on the side of the pump/motor assembly is scratched and I cannot make out the first digit, but the others are clear. _9271A1 Hopefully somebody knowledgeable might know what I'm talking about.
I've thoroughly scoured the previous posts on this topic. I've found a few that had the same problem, but I couldn't seem to find what the solution was. Here goes:
I have a 1979 MCM470 that trims up, but won't go back down. I am looking for a wiring diagram for the trim pump/motor. I need to know where to check for fuses and to make sure it is wired properly.
When trying to put the lower unit back down, the trim pump/motor runs (its audible) but sounds like it is a little sluggish compared to going up. So far I've pulled connections the cleaned and greased with some dielectric grease. Same results. My next step is pulling the whole pump/motor assembly and checking to make sure there isn't a clog or something somewhere before re-wiring.
The boat was my fathers, and for the last couple years my brothers who had access to it treated the boat poorly. I see they or somebody may have tried to fix things themselves under the engine cover. Many of the wires are cut and spliced together in a jackass fashion. There were even 2 wires cut, leading to nowhere, and 1 wire attached to the top of the pump - also leading to nowhere. Furthermore, through Google, I've read about a trim limit switch and trim sender. These wires run through the transom to points on the port and starboard sides of the lower unit. It looks like a Purple and a Blue wire from the wire harnes that used to run through the transom have been completely severed. Will this prevent the operation in the down direction? So far it doesn't affect the up direction. If this is a cause, how do you re-run those wires, do I need to remove the entire lower unit?
The p/n on the side of the pump/motor assembly is scratched and I cannot make out the first digit, but the others are clear. _9271A1 Hopefully somebody knowledgeable might know what I'm talking about.