2004, DPSM outdrive, with the trim pump inside the boat. I just had the engine pulled and replaced, and while the engine was out, replaced the salty / crusty transom assembly with a low hour fresh water one. Replaced the motor on the original trim pump while at it. Filled the reservoir, left the cap off, and tried to cycle it up and down. The outdrive moves maybe a 1/2 inch in either direction. So here are all the troubleshooting steps I have tried... I am about out of ideas, and would love some guidance. I have checked all over, and I have no leaks inside or out. I have a second entire trim pump, which I tried, and it also wouldn't move the outdrive more than 1/2 inch.
1 - Disconnected the pin from the end of the rams (so they didn't have to move the outdrive). Tried running the pump up and down, and they still only move a 1/2 inch.
2 - Disconnected both hoses from the trim pump. With the cap off the reservoir, when I turn on the pump going up, it sprays a fast stream out one port. When I turn the pump on going down, it sprays a fast stream out of the other port. This seems to indicate there is not a problem with the pump.
3 - With the hoses reconnected at the trim pump, if I disconnect both hoses from one trim cylinder, when I turn on the pump going up, I get a fast stream out of BOTH hoses going to that cylinder. When I turn on the pump going down, I get no spray out of either hose, and the pump sounds like it would when it is unable to move fluid.
4 - With the hoses still connected at the trim pump, I disconnected the hoses from both trim cylinders. When I turn on the pump going up, I get a fast stream out one hose from each cylinder. When I turn on the pump going down, I get no spray out of any hose, and the pump sounds like it would when it is unable to move fluid.
5 - At the trim pump, I swapped the two hoses into the other port, and repeated test 4. When I turn on the pump going DOWN, I get a fast stream out one hose from each cylinder. When I turn on the pump going UP, I get no spray out of any hose, and the pump sounds like it would when it is unable to move fluid.
6 - With the hoses disconnected from the trim cylinders, I am able to push both trim cylinders by hand their full range of motion (and of course, the first time doing this for each, fluid sprayed out of them).
I am no expert on these though, and am really stuck on what to try / test next. I would have thought that test 4 should have had fluid come out the other hoses when I ran the pump down. Since fluid comes out the pump in both directions (test 2), shouldn't fluid have come out both ways in test 4?? Any advice is greatly appreciated!
1 - Disconnected the pin from the end of the rams (so they didn't have to move the outdrive). Tried running the pump up and down, and they still only move a 1/2 inch.
2 - Disconnected both hoses from the trim pump. With the cap off the reservoir, when I turn on the pump going up, it sprays a fast stream out one port. When I turn the pump on going down, it sprays a fast stream out of the other port. This seems to indicate there is not a problem with the pump.
3 - With the hoses reconnected at the trim pump, if I disconnect both hoses from one trim cylinder, when I turn on the pump going up, I get a fast stream out of BOTH hoses going to that cylinder. When I turn on the pump going down, I get no spray out of either hose, and the pump sounds like it would when it is unable to move fluid.
4 - With the hoses still connected at the trim pump, I disconnected the hoses from both trim cylinders. When I turn on the pump going up, I get a fast stream out one hose from each cylinder. When I turn on the pump going down, I get no spray out of any hose, and the pump sounds like it would when it is unable to move fluid.
5 - At the trim pump, I swapped the two hoses into the other port, and repeated test 4. When I turn on the pump going DOWN, I get a fast stream out one hose from each cylinder. When I turn on the pump going UP, I get no spray out of any hose, and the pump sounds like it would when it is unable to move fluid.
6 - With the hoses disconnected from the trim cylinders, I am able to push both trim cylinders by hand their full range of motion (and of course, the first time doing this for each, fluid sprayed out of them).
I am no expert on these though, and am really stuck on what to try / test next. I would have thought that test 4 should have had fluid come out the other hoses when I ran the pump down. Since fluid comes out the pump in both directions (test 2), shouldn't fluid have come out both ways in test 4?? Any advice is greatly appreciated!
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