The Boating Forum - 2005 F250 anodes

Where are the anodes located on the engine? I took the rear cover off, but cant ID.

You've got a bunch.. a few you can't get to unless you remove the heads. Some in the water jackets, some under the spark plugs, some in the thermostat housings, and of course the trim tab and one under the tilt/trim motors.

I'd like to be able to check them, but I gotta find them first

You will see more erosion of the anodes under the spark plugs, (check this (http://www.thehulltruth.com/boating-forum/317940-yamaha-f250-engine-thermostat-anode-pics.html) thread) the trim tab, and under under the tilt/trim motors.

I checked all mine (except for the ones that require the cylinder heads to be removed) at 200 hours, all salt water use, and those were the only ones that needed replacing.

Thanks, Joe. I replaced the trim tab and the ones under the trim/tilt. I just have to look for the others on the engine.

Are these the cylinder head anodes? The flash washed out the red dot on the upper. It looks like there are a total of 4 of these kind between the spark plugs. How do you get these things out? Just keep wiggling and pulling?.
http://img.photobucket.com/albums/v624/kcart55/250anode.jpg

Yes..they are the anodes..make sure that you open the correct bolt (NOT the one with the red dot in the photo,or the anode will drop into the head and you will have real fun!) Take out the other bolt holding the arm and then you can wiggle the arm gently with a pair of pliers and pull the anode out. Mine were fine after 2 yrs and just needed to be wire brushed. Whether you brush them or replace them, I would use new o rings, o ring grease and torque them correctly to avoid crushing the o ring...but thats just me. Go for it..piece of cake.

Thanks, Yammi, big help! I kinda figured not to remove that center bolt. I just wanted to make sure I was working on the right thing.