Yamaha more susceptible to Salt corrosion? Take a look at THIS! Pic!

[SeaKaye12]

I guess that maybe the "precision blend" of alloys is responsible for this?

If you want to buy it; it's on e-bay (where else!!) Item number: 160163659109

As a question here....I wonder if one area is worse than others when it comes to salt water corrosion. I live in Southern California....where this motor comes from, according to the listing. I've never seen corrosion like this around here...and many people leave their motors down when they store their boats at harbor slips...

Thanks for reading, Chuck

 

[zzzzz]

Re: Yamaha more susceptible to Salt corrosion? Take a look at THIS! Pic!

he had to have left something on the boat turned on to have THAT kind of corrosion !!

 

[j442w30]

Re: Yamaha more susceptible to Salt corrosion? Take a look at THIS! Pic!

I think Precision Blend is the oil injection system on that engine, not the aluminum alloy used in the castings. I've never seen anything corroded that bad!! That looks like it was dipped in acid.

 

[TOHATSU GURU]

Re: Yamaha more susceptible to Salt corrosion? Take a look at THIS! Pic!

Take a look at the pattern of corrosion on the leg. See how it goes up at the rear of the engine. That's a sign that the boat that it was on was partially submerged. I would guess that it was on a semi-sunk boat for years.

 

[Chris1956]

Re: Yamaha more susceptible to Salt corrosion? Take a look at THIS! Pic!

Nah, That is one of those "cut-away" versions that show you the internal parts. You can see the driveshaft and the gears in the lower unit.

Makes it easy to learn to shim the pinion gear.

Alternatively, maybe it is from the acid rain we get!

 

[gss036]

Re: Yamaha more susceptible to Salt corrosion? Take a look at THIS! Pic!

Gotta have those zincs on the motor and in good shape. If I spend a couple of days at Friday Harbor Marina on San Juan Island and leave my motor down, I can count of having to replace the zincs because of all the stray electric current there. Just a fact of life.

 

[Bigjohn1]

Re: Yamaha more susceptible to Salt corrosion? Take a look at THIS! Pic!

This is not a credible indication of Yamaha's salt water toughness. Way more to this story.

 

[tashasdaddy]

Re: Yamaha more susceptible to Salt corrosion? Take a look at THIS! Pic!

that is 100% pure neglect. the owner could have obviously seen the damage been done. no zinks, high electrical content to the water. that did not happen overnight, or a season.

 

[SeaKaye12]

Re: Yamaha more susceptible to Salt corrosion? Take a look at THIS! Pic!

Is the electrical content of the water measurable? how?

Chuck

 

[zzzzz]

Re: Yamaha more susceptible to Salt corrosion? Take a look at THIS! Pic!

there is a test...I think they use some kind of multi-meter with a probe and check and record measurements all around the boat...do a search for galvanic corrosion and you'll probably come up with the test method

 

[External Combustion]

Re: Yamaha more susceptible to Salt corrosion? Take a look at THIS! Pic!

Galvanic corrosion from an unwisely connected battery charger could easily do that in one season of winter storage on the water. The same with an automatic bilge pump. Faulty bonding of all of the grounds is one of the most common culprits.

This is another good reason to check on your posessions regularly.

The dealers probably either love this owner because he is an easy sell for new equipment, or they hate him because he is an unjust whiner. "It was OK when I left it!"

 

[eli_lilly]

Re: Yamaha more susceptible to Salt corrosion? Take a look at THIS! Pic!

If nothing else, it's one of the best examples of galvanic corrosion that I've seen.

-E

 

[1730V]

Re: Yamaha more susceptible to Salt corrosion? Take a look at THIS! Pic!

Yamaha had some corrosion issues-early on, especially there V-6's. I've never seen anything like that. Early Suzukis were known as "sizzlers". They were like putting Alka Seltzer in water.

Nobody beat corrosion like OMC (Johnson/Evinrude). Their patents, for metallurgy, are still valid and used by Bombardier.

There was some serious current, in that water, for that to happen-WOW!

 

[Texasmark]

Re: Yamaha more susceptible to Salt corrosion? Take a look at THIS! Pic!

Merc also flaunted their 7 step (I think) anti corrosion process with special alum alloy (forgot the trade name) , zinc-chromate primer, and black lacquer.

Course it took them awhile to figure out that the carbon steel driveshafts had to go.....OMC learned that early on.

Mark

 

[EricR]

Re: Yamaha more susceptible to Salt corrosion? Take a look at THIS! Pic!

We had a customer with a couple aluminum passenger ferries that just kept having to replace heat exchager cores and housings, they kept inisisting they were changing their zincs. I told they they neede to get an electrician to check the boats over for grounding problems. They never would. These were Lugger marine diesels (actually Komatsu industrial engines, marinized by a company in Alaska)

Another local bought one of the boats, had us do some engine work. I had a lot of corroded, eaten up parts.

I ran a test where you put the lead of your meter on the positive post of the starter with the battery switched on, and you take the negative lead and suspend it in the coolant in the engine's expansion tank. If I recall, anything over 550 Mv (thats millivolts) is cause to look farther. They had 24 volts DC grounding through the coolant!

Plus the zincs on the hull and running gear were gone in a couple weeks, they had a spot on the hull that was sizzling like an Alka Seltzer.

Finally, they had an electrician go over the boat- there were all kinds of both AC and DC systems with loose grounds, the bonding system was completely not working. They listened and had the work done. They have not had ANY more problems.

Whatever boat that Yamaha was on would have eaten any brand of outboard, there was more than some salt water and the lack of a zinc going on there.