2006 Bayliner 180 - trim pump stopped working

JBtwist

Seaman
Joined
Jul 22, 2018
Messages
58
Hey Everyone,

We got a new (to us) Bayliner boat earlier this season. It was in great condition, but the outdrive wouldn't go down, only up. I took at look at the pump and when I jumped the solenoid - I could lower it. So, I pulled the pump out and replaced the lower solenoid and everything worked as expected. All good.

We then used the boat for a couple months and everything worked great. No issues. Put the boat in a friends slip and would raise and lower the outdrive when parked and when taking out. After sitting in the water a couple weeks, the outdrive will not go up or down anymore (it's currently down). When I press the button on the handle (both up or down) I hear the solenoid click ONE time and then it won't do anything else. Come back to it sometime later and again - clicks once but no movement and won't click again.

Feels like it's a power issue? The battery is new, although it's a 2 battery system and I don't know much about it. The other battery tested good, but is a standard non-marine car battery. I did get in last night and try to jump the "raise" solenoid and nothing. I'm really confused as to what changed.

So - in a couple weeks, I'll need to get my boat out of their slip and remove it from the water. I don't have tools down at the marina, so I'd prefer to do the investigation work in my drive. Is there anyway to force raise the outdrive (Alpha One)? Or any other advice of things to check out or test?
 

alldodge

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Mar 8, 2009
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42,559
Either corrosion (most likely) and bad connection, or blew one of the 2 fuses (110 amp and 20 amp)
Use a voltmeter to see where power is and is not. If power is found, push the trim button and if it goes away then there is corrosion

Trim wiring Merc 2012.jpg
 

JBtwist

Seaman
Joined
Jul 22, 2018
Messages
58
This is really helpful. Thank you.

When I replaced the solenoid, I actually removed the entire unit and cleaned everything up, so when you say corrosion - you mean on terminals, etc? Because I don't think that's an issue -- I replaced all the nuts/washers and wire-brushed all the leads/terminals.

I did check the 20amp fuse last night, it's good. The 110 is insanely hard to get to, it's inside a red box and connected to both leads of the solenoid.

When you say meter for power - is that on the solenoid switch side, or on the main leads?
 

alldodge

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Volt meter to measure 12 volt power

If you have 12V on the main wire on top the square fuse, there should also be 12V on one terminal of each solenoid, and 12V at the 20 amp fuse

With nothing working even by jumping I would expect a fuse
 

JBtwist

Seaman
Joined
Jul 22, 2018
Messages
58
ok - awesome. I'll try to get down and check it out tonight.

Where do I get a replacement fuse like that one? I've never seen one like that before.
 

JBtwist

Seaman
Joined
Jul 22, 2018
Messages
58
OK - climbed in the back last night with a meter. Both fuses are good. Meter gives me 12V between main positive wire and main ground on the pump and then when the trim button is pressed - it drops to .8V
 

alldodge

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That is corrision
Remove the wires and look real good at them. Grab the terminal ends and pull on them, they might come off
 

JBtwist

Seaman
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Jul 22, 2018
Messages
58
man, you seem pretty confident about this, but when I had the motor out, I took EVERY lead apart and wire brushed it all. When you say "pull terminal ends" - do you mean the ones from the switch to the solenoid? Also - one solenoid is brand new, so wouldn't only one side of the pump be the issue if it were corrosion?
 

alldodge

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Compare electric flow thru a wire as water thru a hose

Corrosion acts as a restriction and can be at the ends of the wire, and in rare occasions can be inside the wire.

12V.jpg
 

JBtwist

Seaman
Joined
Jul 22, 2018
Messages
58
Dug in hard this weekend and it appears as though I have a corrosion issue between pump and battery, but also a bad solenoid! I spilled a lot of hydraulic fluid messing around - what type of fluid does that pump use?
 
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