Yanmar 4JHE Anodes?

Nodak7

.
Sep 28, 2008
1,256
Hunter 41DS Punta Gorda, FL
Are there anodes to replace in my Yanmar 4JHE engine. Cannot seem to find any reference to them in the manuals. Is the anti corrosion in the coolant the only means to prevent corrosion?
 
Dec 15, 2017
58
Hunter Legend 41AC Portsmouth
No anodes in that engine that I am aware of (as have a 4JH3E) as I have not seen any mentioned in the manual for the engine or seen any on the engine.
 

Nodak7

.
Sep 28, 2008
1,256
Hunter 41DS Punta Gorda, FL
Thanks as I thought but the other night I was looking at the 4JH4 Service Manual and found this entry under the 250 HR and 500 HR Maintenance recommendation. The manual does not state it is for the 4JH4E Specifically but I thought that the "E" was only a small variation on the engine type. Just wanted to make sure I was not over looking anything! Thanks again!
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JamesG161

SBO Weather and Forecasting Forum Jim & John
Feb 14, 2014
7,744
Hunter 430 Waveland, MS
I have never found an Anode on my Volvo Penta, either.
Hunter expected the shaft and engine to be "electrically connected" together.
Thus Anode protection.
If your shaft is NOT isolated from engine, you shaft anodes should protect it.
Jim...

PS: I have verified that my engine is at the same galvanic potential as shaft, with a AgCl reference probe.;)