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Old 08-20-2019, 10:38 PM
ernst ernst is offline
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Quote:
Originally Posted by Al Schober View Post
First tip is to use eye protection. Glasses with side shields or even a full face shield. When going after the existing rust, a small hammer & chisel works on the heavy stuff.
Check the water jacket plate behind the starter/distributor. If that is still installed with bolts, I recommend changing to studs.
I've never used the POR stuff, so no comment. The Rustoleum oil based products work well IMHO, primer first then top coat. The primer is more important than the top coat.
A primer I've used with great success is Interlux Interprotect 2000E - a two part epoxy with moisture barrier. The smallest kit is a gallon size, designed to be mixed all at once for barrier coating hulls. Mixing it in smaller batches is messy, but I've done it by weight. As I recall, the ratio is about 6:1 by weight - check the MSDS sheet to get from volume ratio to weight ratio.
THANK YOU for the emphasis on safety. I don't have a face shield but I will definitely put on safety glasses.

As for paint, I agree that the primer is probably the most important part. An epoxy paint is not the first thing that would have come to mind because of the elevated temperatures, in particular on the exhaust manifold but I am glad it worked for you (I looked at the manual https://j109.org/docs/interprotect-2000e.pdf and it does not seem to give a limit on operational temperature). Incidentally, I think the Interlux Interprotect 2000E primer is now available in quart size, e.g. at Discount Marine; at least that is what google said.

But if I hear no negatives, I plan to stick with my POR-15 plan. I noticed that some others seems to have used it for the Afour, see post #3 by bunnyplanet at http://www.moyermarineforum.com/foru...ead.php?t=9841, post #10 of http://www.moyermarineforum.com/foru...ead.php?t=2735, post #6 of http://www.moyermarineforum.com/foru...thread.php?t=8, various posts in http://www.moyermarineforum.com/foru...read.php?t=657
and quite a few others on the Moyer forums mention it (don't want to clutter up this post with all the links). So far I haven't found any that said bad things.

As for changing the bolts on the water jacket plate to studs, that may be a great idea. I haven't looked at that for ~15 years but I remember it was a bit sketchy. With the alternator out of the way it would be a good opportunity to make the change. What I am concerned about is 'mission creep.' If the bolts are in good shape, I might go for it. But if the bolts look like I might be creating a problem, I will hesitate. Don't want to dig deeper and deeper, taking into account the last sentence of bunnyplanet (again post #3 in http://www.moyermarineforum.com/foru...ead.php?t=9841).
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