Can’t find any anodes.

[Buzzsaw420]

I have a 1979 OMC 2.5 liter, 990243 on a 400 stern drive 981871( with 15 spline prop shaft). Are there any anodes on this outdrive that are hidden, I can’t find any. I only run in fresh water but I noticed a bit of corrosion on the transducer screws. Thanks for your time.

 

[southkogs]

I don't know for sure on the newer models, but on my old electric shift the zinc was actually on the hull. It was mounted to the starboard side of the transom boot.

 

[Buzzsaw420]

Thanks for the reply southcogs, nothing there either. So would it be alright to put one somewhere back there under the waterline(well sealed) as long as it doesn’t effect anything?

 

[racerone]

Parts book shows 938432 on bottom of intermediate housing.---Shown for the 140 model.-----Item #41 at about $50.

 

[Buzzsaw420]

Parts book shows 938432 on bottom of intermediate housing.---Shown for the 140 model.-----Item #41 at about $50.

Thanks racerone, #41 part 982277 on my parts book says ground plate is this the same?

 

[racerone]

It says it is zinc.----And your parts book has not been updated.------Look it up online at several places !

 

[Buzzsaw420]

Can’t find that part number anywhere and I do try to look things up before I ask a question. I did find a ground plate(982438) that is made of zinc but being in fresh water I thought aluminum or magnesium would be better. I will look into updating my 43 year old parts book!

 

[racerone]

Simple----982277 is superceded / changed to 982438-----End of the story.

 

[Buzzsaw420]

It’s a 43 year old boat, lots of chapters to it’s story.

 

[kenny nunez]

The stainless steel wire from the upper cover to the pivot cap is also part of the grounding protection. On electric shift drives it also assured a negative ground to the shift coils.

 

[Buzzsaw420]

Thanks Kenny, definitely something I will check, cheers.

 

[racerone]

A 1979 is not electric shift.

 

[Buzzsaw420]

I believe he was just putting that out for those with electric drives.

 

[kenny nunez]

When I was referring to grounding on the 400 drive in the picture OMC also said it was for galvanic purposes and also Is why it was retained.

 

[Buzzsaw420]

When I was referring to grounding on the 400 drive in the picture OMC also said it was for galvanic purposes and also Is why it was retained.

Makes sense to me, I’ll make sure I get all that cleaned in there. Thanks again.