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Old 09-17-2018, 03:16 PM   #21
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Aluminum oxidizes immediately to Aluminum Oxide after sanding. I believe it’s advised to use an acid based primer for the bare aluminum
Rustoleum and others make it. I’m repainting some powder coated aluminum window frames that have the factory coating oxidizing.
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Old 09-17-2018, 04:20 PM   #22
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Aluminum oxidizes immediately 5

to Aluminum Oxide after sanding. I believe itís advised to use an acid based primer for the bare aluminum
Rustoleum and others make it. Iím repainting some powder coated aluminum window frames that have the factory coating oxidizing.
I can only relay how aluminum aircraft skins are protected in a salt water environment. Zinc oxide primers are the standard.
There is an epixy based zinc oxide as well which us also very good!

The downside to the Rust-Oleum Topside paint, is that it's not formulated to be painted on surfaces that will be in constantly under water. I made that mistake with my Whaler it lives most of it's time on a trailer. After 3 years, it's peeling on the bottom areas of the hull. The sides of the hull above the water line are still perfect. Even in the south Florida sun!
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Old 09-17-2018, 04:37 PM   #23
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I can only relay how aluminum aircraft skins are protected in a salt water environment. Zinc oxide primers are the standard.
There is an epixy based zinc oxide as well which us also very good!

The downside to the Rust-Oleum Topside paint, is that it's not formulated to be painted on surfaces that will be in constantly under water. I made that mistake with my Whaler it lives most of it's time on a trailer. After 3 years, it's peeling on the bottom areas of the hull. The sides of the hull above the water line are still perfect. Even in the south Florida sun!
Good to know. I'm only doing window frames on my boat.
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Old 09-17-2018, 04:42 PM   #24
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Without hijacking the thread, would this make a good tow
behind dinghy?
I have a 9ft Caribe with a 9hp johnson on Weaver davits.
I feel safer in the 10ft Lund aluminum boat but I hear
aluminum boats aren't welcome at some dinghy docks.

Which would you bring along ? or both ?
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Old 09-17-2018, 05:20 PM   #25
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I was gonna recommend a 9.9 tie hot sue but I see you have a better plan. Those boats can take a 15hp two smoker. One of the guys on the tinboats forum did one up nice with a small wood side console about midways. I can't remeber his engine but it was remote controlled instead of tiller. Real nice boat. Been years snce I've seen it.
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Old 09-19-2018, 06:42 PM   #26
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Perfect engine for that boat. Is that block the same as the 6hp and 8hp or the same as the 15hp? I can't remember, and Ted may be right, it might not be able to be souped up to 15hp. If it can, it seems like a no brainer.

I must have missed this question. The powerhead on the 9.9 is the exact same as the 15. They are commonly called "JohnnyRude's" when you do the carb swap. I've been reading a ton on the conversion and watched a lot of youtube videos from guys who have done it.

This guy does a TON of work and has lots of videos on small outboards.

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Old 09-20-2018, 08:39 AM   #27
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The crappy thing is, a lot of lakes around me have banned two strokes or only allow the newer type "clean" two strokes.
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Old 09-20-2018, 10:39 AM   #28
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I have a 4hp Johnson of that vintage. Great outboards. If you need parts, Stone & Sons Marine in Houston carry lotsa parts for those engines.

Kevin


QUOTE=toocoys;697612]I think I've secured a 1984 Johnson 9.9 for about $450 including shipping to me.

The fun part is that the 9.9 is the exact same engine as the 15 except for the carburetor. So a carb swap should give me more hp if I end up needing it.

I think it looks like a very clean engine.[/QUOTE]
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Old 09-21-2018, 01:57 AM   #29
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The crappy thing is, a lot of lakes around me have banned two strokes or only allow the newer type "clean" two strokes.

How can they ban an engine? That would be like telling people they must trade in their older car.
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Old 09-21-2018, 02:02 AM   #30
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I have a 4hp Johnson of that vintage. Great outboards. If you need parts, Stone & Sons Marine in Houston carry lotsa parts for those engines.

Kevin



Awesome! I hope to have the Lone Star back here from the farm in a few weekends. I'm going to have to work on it at our RV lot since the shipyard wont let me DIY.

I think I'm going to buy a 1957 Johnson 7.5hp from the same guy... I need a project. It'll be my special occasion motor.
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Old 09-21-2018, 02:07 AM   #31
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I think I'm going to buy a 1957 Johnson 7.5hp from the same guy... I need a project. It'll be my special occasion motor.
Next you`ll be buying a Seagull( or two) and developing a collection of antique outboards!
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Old 09-21-2018, 02:10 AM   #32
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Next you`ll be buying a Seagull( or two) and developing a collection of antique outboards!

Nah. I'm afraid the spouse doesn't quite know about the antique one. LOL! It's just going to be a surprise in the crate.
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Old 09-21-2018, 11:16 AM   #33
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How can they ban an engine? That would be like telling people they must trade in their older car.
The explanation I get is that the reservoir is for drinking water and older two strokes put out a lot of unburnt fuel oil mix. In 2007 I was denied lake permit renewals for two of my local lakes because my Gamefisher J-boat came with a 5hp Gamefisher two-stroke air-cooled outboard. I have since scrapped both.
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