Corrosion of trim pump

Msp381

Msp381

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I’m looking at a 2013 GW with a Yamaha 300 fourstroke. Has 175 hours on it and boat is extremely clean. Only issue I see is corrosion on lift pump. Seems excessive. Any thoughts?IMG_5685.png
 
The pump doesn't look good. If it were mine I would plan on it. Unusual run around top seal. Looks like it was hit with something scraping the paint off down to bare metal.
 
Current pic of just one of the anodes. Not sure what the others look like.
 

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Anodes are due. Interesting experiment - get a gram scale and weigh old ones and new ones.
 
That is strange looking! Almost looks like most of the other components are new or have been recently changed. Never seen an electric motor with that much corrosion. I look a little deeper on that one. Lift cylinder appears to have been repacked. Yellow top is not original I suspect.
 
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I was told there were new seals out on and hydraulic fluid because the outboard would not lift a year ago. No receipts or work order because owner did it himself. Little sketchy IMO. The rest of the boat is super clean and absolutely no sign of corrosion anywhere including fittings and wiring in enclosed areas.
 
That anode is way past replacement time. It probably does not provide any protection.
Corrosion on the tilt motor housing is pretty bad also. I would try a product like Rust Con that converts rust to a hard surface for painting. It it also hard to work on the back of the housing without disconnecting the entire pump or at a minimum the lift ram so that the assembly can be tilted out.
 
Looking at that skeg anode makes me think the previous owner had the boat in the water where there was some strong stray current existing. That could easily erode the anode in a short time and corrode the case of the pump motor. That is not a big deal. Just expect to have those obviously damaged parts changed. Use that condition as a topic in your price negotiations and take home a nice boat. It's just parts.

Also use the obvious, excessive deterioration from electrolysis as a warning to be careful and take precautions in the future when spending extended time in the water in marinas.
 
Halfhitch said:
Looking at that skeg anode makes me think the previous owner had the boat in the water where there was some strong stray current existing. That could easily erode the anode in a short time and corrode the case of the pump motor. That is not a big deal. Just expect to have those obviously damaged parts changed. Use that condition as a topic in your price negotiations and take home a nice boat. It's just parts.

Also use the obvious, excessive deterioration from electrolysis as a warning to be careful and take precautions in the future when spending extended time in the water in marinas.
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That may be the case but without knowing how long the anodes were in service, you can assume it is a stray current issue.
The anode as they work change composition and are basically useless at some point even though they still have some meat to them The general rule of them is that when the anode reaches half of its original weight, it is time to replace.
 
Absolutely typical for the trim motor to rust like that. It doesn't mean it is good or that you shouldn't consider replacing at some point, but certainly don't look too deeply into why, it happens on almost all of them, including the two on my lift kept F250s.
 
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The anode is doing it's job - that's what they are designed to do. That is a GOOD thing. It's still "decent" - but it's getting close to replacement time.

The trim pump - it happens - pretty normal. It starts at the crack between the top cap and body as that's a "hard" edge that doesn't hold paint well. Might have been a so-so paint job to begin with. BUT that's an isolated item and easily cleaned/re-painted or just replaced. In other words, that has no impact on anything else.

The pump is 12 years old - it may also have been replaced once already and possibly by an inferior product... screws are rusted.
 
I appreciate all the feedback. By looking at the boat and its condition the boat was definitely not left in the water when not used but most likely kept on a covered lift. Absolutely no sun fading and bottom of boat is clean w/o bottom paint. Thanks again
 
DennisG01 said:
The anode is doing it's job - that's what they are designed to do. That is a GOOD thing. It's still "decent" - but it's getting close to replacement time.

The trim pump - it happens - pretty normal. It starts at the crack between the top cap and body as that's a "hard" edge that doesn't hold paint well. Might have been a so-so paint job to begin with. BUT that's an isolated item and easily cleaned/re-painted or just replaced. In other words, that has no impact on anything else.

The pump is 12 years old - it may also have been replaced once already and possibly by an inferior product... screws are rusted.
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Really Dennis? :) Did you look at the photo of the trim tab anode, not just the bracket anode. That tab anode looks like swiss cheese.
 
seasick said:
Really Dennis? :) Did you look at the photo of the trim tab anode, not just the bracket anode. That tab anode looks like swiss cheese.
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I did - it's getting awful close to the "need" to do it. But it also depends on how the boat will be used - if it will end up being trailered, then it's less of an issue. If it will be going in a slip, I'd change it for piece of mind.
 
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They will go due to being a motor and the location. I've done one and expect to do the other shortly. Not cheap but required.
 
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