zinc anode for corrosion

[teton]

so i know zinc anodes's were used in stock superjets to keep corrosion from happening in the cooling area, well i doubt anyone even knows about them or replaces them, but they are used to prevent corrosion because the salt water attacks the zinc before the aluminum

does anyone sell the replacements....

I noticed in the cylinder cooling area there is a fin between the cylinders which has a tapped hole, looks like this is where the stock one should go

since i do mostly salt water riding and i have seen some real crusty cooling area's

seems like it would be a good idea to check and replace these anodes to prevent that sort of thing

what do you all think?

 

[eel]

Some people remove them to prevent the possibility of it falling off. I leave them on in salt water ski's but Im doubtful of their effectiveness. They seem to be just about immortal, wich defeats the purpose of being an anode.

The ideal would be to use a different less noble zinc alloy, maybe a ground down piece of mercruiser anode?

I would be pulling the head at least bi-annually to check though.

I don't know why the pwc manufacturers don't put more thought towards real corrosion protection like the outboard guys. Merc outboards have a yellowish treatment on the cooling jacket that works killer, I have seen salt water commercial mercs that have never seen even a flushing hose for 3 years and the innards look like new!

Brp go on about the closed loop 4tecs and it's a good idea (on a couch) but while the cooling system stays mint, everything else corrodes off them. After a year, the driveshaft looks like its a relic from the Titanic and after a couple of yrs, the ride plate/heat exchanger starts to bleed green coolant.

Don't get me started on the 2stroke rotax's. Nice engines, Im not sure if they were intended to be used in water though.

Kawi's are ok but their love of using studs everywhere can make dismantling stuff a challenge. You learn to love your oxy.

Yamaha's are probably the best salt water pwc.

 

[teton]

has anyone ever powder coated the cooling area, seems like it would prevent corrosion, however i could see it peeling of if not done right and causing problems

 

[Frosty]

when i was living down south i was anal about using salt terminator and spending a ton of time thoroughly washing everything after each ride. after about 3 years of salt water riding i had no corrosion at all.

now living back north, fresh water riding only, it's kinda nice.. but no good surf.

 

[Zeon]

im so with you frosty.. im glad we live on a freshwater lake

 

[eel]

has anyone ever powder coated the cooling area, seems like it would prevent corrosion, however i could see it peeling of if not done right and causing problems

Good idea, but it wouldn't work for a couple of reasons. Powder coating is a relatively good thermal insulator wich would greatly reduce the heat transfer from the engine to the coolant. Also, the powder coating would tend to start to corrosion bubble and peel from the edge at the machined faces.

If anyone knows what that yellow gear is that's inside merc outboards, pls. let me know.

 

[eel]

im so with you frosty.. im glad we live on a freshwater lake

I would like to live on a freshwater lake as well, as long as it had a permanent bouy course and was at the most 15 mins from the ocean.

 

[Frosty]

and was at the most 15 mins from the ocean.

God I miss the ocean!!!

 

[Mouthfulloflake]

whats that red stuff, folks put in the cooling passages of V8 engines to supposedly gain thermal transfer and corrosion inhibition?

I havent gotten a summit or Jegs catalog in years, but they used to be in there, looked like a red "dykem" product.


arggggg. must search now.....