Monster 900 1997 Tank has a baffle in situ ,anybody seal a tank with the baffle in situ? She is starting to rust inside
I have never used Por or any other tank sealants as I have read too many horror stories on the internet of it going wrong and then being impossible to remove from the tank. I have had a number of old rusty tanks I have successfully cleaned up with phosphoric acid. It is essentially the same base ingredient in Kurust rust removers, and converts the rust (iron oxides), to produce ferric phosphate, a black relatively insoluble compound. Note that it converts it, not dissolves it, and if you have severe rust with loose flakes, these will then need to be removed. I used baking beads shaken around inside the tank, but any loose abrasive would work. Your tank doesn't look bad inside by comparison with my ones, so may not produce loose flakes.
Good advice from Geff. I had an LC350 that had this treatment done, the rust continues under the sealant and does not stop, then it becomes almost unrepairable.
Thanks Guys The kit comes with - 1 x POR-15 Marine Clean (946ml) to dissolve and remove gum and varnish that accumalates over the years; - 1 x POR-15 Metal Ready (946ml) to remove rust, etch the interior surface, and leave a zinc phosphate coating ready to accept Think I will just use these two (not the sealer), keep an eye on it over the years
In the past I have had really good results by setting up an electrolytic cell with a sacrificial steel anode using washing soda as an electrolyte and an old style battery charger to provide the EMF (you can also use a decent size lead acid battery). This gets it totally rust free, including in sub surface pitting. You could then decide how you want to protect it for the long term I.e. with phosphoric, or a coating.
My 96 Africa Twin is far worse than that. Ive got a inline filter in there that i change every 6 months or so and rarely do it looks rusty in colour when i cut it open ... id not worry about it ...
