New to the forum, new to boating, and new to fixing boats. After spending a couple of days researching and coming up short, I decided it was time to put the question out to the experts.
I'm having an issue with fluid leak down (the motor won't stay up) and was able to diagnose the problem as a failure of the "medium spring" in the tilt/trim pump (the spring has 5 coils that have broken due to corrosion).
I'm trying to source a replacement spring and don't have some of the details I need to find a replacement. Here's what I DO have based upon what I have measured on the existing spring:
Wire Diameter: .040"
Outside Diameter: .226"
Compressed Length: .645" (this is just a guess)
Free Length: 1" (this is also a guess based upon how much unbroken spring I have and adding back 5 coils)
Coil Count: around 15 (another guess)
What's got me stumped is the Spring Rate (lbs/in). What am I shooting for? I've found springs with similiar attributes that have a spring rate of 14 lbs/in, or 40 lbs/in, or 60 lbs/in. My layman's guess is it's a pretty heavy spring, but I'm not sure what problem will result from a spring that is too heavy. I would guess that going too light would not fix the issue and too heavy would prevent the pump from raising the motor. (It's another of my guesses, so if I'm wrong please let me know; this literally is my first visit to the land of hydraulics)
Also what material type is best? I'm guessing high carbon steel, or high carbon steel music wire... but I really don't know.
Does anyone have the specs for the springs in a 1980 Chrysler 75 trim pump? The medium one is the broken one, but I may as well replace both. Here's a diagram:
I also may need to source a poppet valve (is that what it's called? The little valve that the spring is pushing against). The current one is a little chewed up from the broken spring. I think I can make it work, but finding a new one would be better.
Any pointers to tracking these parts down would be much appreciated.
I'm having an issue with fluid leak down (the motor won't stay up) and was able to diagnose the problem as a failure of the "medium spring" in the tilt/trim pump (the spring has 5 coils that have broken due to corrosion).
I'm trying to source a replacement spring and don't have some of the details I need to find a replacement. Here's what I DO have based upon what I have measured on the existing spring:
Wire Diameter: .040"
Outside Diameter: .226"
Compressed Length: .645" (this is just a guess)
Free Length: 1" (this is also a guess based upon how much unbroken spring I have and adding back 5 coils)
Coil Count: around 15 (another guess)
What's got me stumped is the Spring Rate (lbs/in). What am I shooting for? I've found springs with similiar attributes that have a spring rate of 14 lbs/in, or 40 lbs/in, or 60 lbs/in. My layman's guess is it's a pretty heavy spring, but I'm not sure what problem will result from a spring that is too heavy. I would guess that going too light would not fix the issue and too heavy would prevent the pump from raising the motor. (It's another of my guesses, so if I'm wrong please let me know; this literally is my first visit to the land of hydraulics)
Also what material type is best? I'm guessing high carbon steel, or high carbon steel music wire... but I really don't know.
Does anyone have the specs for the springs in a 1980 Chrysler 75 trim pump? The medium one is the broken one, but I may as well replace both. Here's a diagram:
I also may need to source a poppet valve (is that what it's called? The little valve that the spring is pushing against). The current one is a little chewed up from the broken spring. I think I can make it work, but finding a new one would be better.
Any pointers to tracking these parts down would be much appreciated.