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Hot dipped galvanized risers

M

mark123

Member
I saw that perfprotech sells hot dipped galvanized
risers for mercruiser. Is this the best option for raw
water cooled in salt water. I have a 4.3 with dry joint exhaust.
 
Please with the hot dipped galvanized....

Purchase OEM and follow the torque specs. Will last 7-10 years. Most people don't own a boat that long.

BTW, a riser is the spacer between the elbow and the manifold on a Mercruiser.
 
Sierra cast iron elbow Marine engine.com) is the exact same price as a hot dipped galvanized (243.00 us) elbow from perprotech. So if price is equal is there any reason not to choose galvanized. You guys are all bashing it but nobody seems to have a valid reason.
 
Galvanizing looks great and protects well on exterior surfaces but does not perform well on interior surfaces, could well restrict flow. I don't see any benefit or harm. Maybe a cost free placebo or not.

How anyone could deduce from post #1 that the OP would need a lesson in exhaust system parts puzzles me. Now the ongoing supposed "misnomer" of "welsh plug" being synonymous to a core plug, now that is ridiculousness.
 
We will often see Elbows being advertised as Risers. This is a misnomer.
Elbows are elbows..... Spacers/Risers are spacers/risers!
Click to expand...

Ayuh,.... Ya mean like refrigerators were called Frigadares,..??
'n copiers were called Zerox machines,..??

Callin' those elbows, Risers is just as accepted today,......
 
mark123 said:
Sierra cast iron elbow Marine engine.com) is the exact same price as a hot dipped galvanized (243.00 us) elbow from perprotech. So if price is equal is there any reason not to choose galvanized. You guys are all bashing it but nobody seems to have a valid reason.
Click to expand...

Add an Electrolyte and it will be off to the races.

Found this for you to read.

Where zinc comes into contact with another metals, the potential for corrosion through a bi-metallic couple exists. The creation of a bi-metallic couple will lead to accelerated corrosion to the anodic metal. The extent of the accelerated corrosion is dependent on the positions of the metals in the galvanic series as well as the relative size of the surface area of the two metals in contact.


Zinc, which comprises the hot-dip galvanized coating is very high on the Galvanic Series, which means it will be anodic to most other metals. So, when hot-dip galvanizing is connected to other metals, the zinc coating will not only sacrifice itself to protect the underlying base steel, but also try to protect the other connected metals. This will lead to a more rapid consumption of the zinc coating, and decrease the overall life.
 
...............
bondo said:
We will often see Elbows being advertised as Risers. This is a misnomer.
Elbows are elbows..... Spacers/Risers are spacers/risers!
Click to expand...
Ayuh,.... Ya mean like refrigerators were called Frigadares,..??
'n copiers were called Zerox machines,..??
I suppose so.
Click to expand...

Chris said:
BTW, a riser is the spacer between the elbow and the manifold on a Mercruiser.
Click to expand...
I'm with Chris on this one.


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