Engine zinc

[Adrian]

I am about to check the engine zinc on 6by260 Yanmar...what do I need to do before I unscrew it? Put the seacock in closed position...and?

thanks,

Adrian

 

[Scottfree]

That's it. You can buy just the zinc and screw it into the brass plug for less money. I buy the zincs by the handful and replace every six months. Never have replaced the brass plug.

Good Luck

Leon

 

[Adrian]

Thank you Leon.

I would assume the same for Fuel Element Filter and Fuel/Water separate filter...close the fuel line. Thats it?

Thanks.

Adrian

 

[Connerkip]

You won't need to close the fuel valves, just make sure the engine isn't running. Changing the filters would only spill out the contents of the filter chamber. Just drain that amount into a pan or ziplock.

 

[baz]

I am about to check the engine zinc on 6by260 Yanmar...what do I need to do before I unscrew it? Put the seacock in closed position...and?

thanks,

Adrian

When you remove the pencil zincs from the engine if they appear to be in pristine condition don't be fooled. Hold the pencil and squeeze it hard between thumb and forefinger. You might be surprised what happens. These zincs are eaten or can be eaten away from their insides and leave you with the impression they have not eroded. It fooled me once. :lol: ...but just once. If they have been eaten away on their insides then the pinching will test this as the pencil will simply collapse between your thumb and forefinger.

 

[rpmerrill]

If the 6BY2 is anything like the 4BY2 (and it is) be prepared.

These buggers are pretty tough to get at. I tried many things, cutting down a big wrench and making an extra pry lever to put some torque on it, and taking the socket and cutting it down to make it a "short" socket. Finally I succeeded and got them out. They were really tight. (Not so tight any more.)

To top it off my two plugs were two different hex dimensions. I forget, 23 and 24mm ?

 

[nzfisher]

The fuel filters can be ridiculously difficult to remove. Often they are over tightened when replaced

 

[CaspersCruiser]

If the 6BY2 is anything like the 4BY2 (and it is) be prepared.

These buggers are pretty tough to get at. I tried many things, cutting down a big wrench and making an extra pry lever to put some torque on it, and taking the socket and cutting it down to make it a "short" socket. Finally I succeeded and got them out. They were really tight. (Not so tight any more.)

To top it off my two plugs were two different hex dimensions. I forget, 23 and 24mm ?

A couple days ago, I changed the engine zincs on my 4BY2. Like you, I was frustrated by tool access that was blocked from seemingly every point of attack. The tool that worked for me was a 8" long adjustable wrench (sometimes called a "Crescent" wrench). Yes, that old jack-leg mechanic knuckle buster, but it worked.

The plugs on my engine were two different sizes-- 22mm and 24mm. When I ordered the new zincs from BoatZincs.com, I ordered the brass plugs. Now both are 22mm.

 

[knotflying]

I guess I am lucky, never have an issue removing the engine zincs. I use a combination open end and box wrench for the top and a long breaker bar with short socket for the bottom. I changed the plugs so that they are both the same size 24 MM which is also 15/16"

 

[captstu]

Just changed my 4by2 zincs. Easy with a 22 mm socket. Replaced from boatzincs.com. Both the same on parts list and my engine.

If you have the extended elbow, it has a third, different, zinc. Not on my 4by2.