1986 17' Boston Whaler Guardian

swamp yankee

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Jul 14, 2007
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New to your forum, have enjoyed reading past postings. Have a new question regarding floatation, hope you can help me out. Here goes.
Currently trying to decide on a new/used purchase. Have found a clean 1987 Montauk, with a 1987 Merc 75/2 stroke, which is on the verge of my spending limit but it needs very little. Now for my potential headache. I have also found a 1986 Guardian sporting a 2001 Suzuki 90/4 stroke which I have absolutly fallen in love with. It was a fresh water patrol boat for a local PD and is a couple of thousand cheaper than the Montauk. She needs a good cleaning but is extremely sharp with a ton of potential. The problem lies with her questionable flotation. I've been told that some years back there was a crack in her hull from shore landings. She had always been kept at the dock so we can assume that she went a season before the crack was noticed and repaired. A poly hull protection strip is currently on so I cannot visually inspect the repair yet. Assuming the repair was done properly, and she is no longer taking on water, my concern lies with the saturated flotation foam. Once saturated and sealed can it be dried out again? Water stains are visibily higher than I think they should be, about 3" above the bottom paint and an officer familiar with the boat told me she rides low and heavy ( but I get the feeling he's got a buddy bidding on the boat also). I normally wouldn't even think twice about it but she sure is sharp, and can be had for about half the cost if the engine replacement alone. This will be my first Whaler and any help would be greatly appreciated. Does unsinkable truly mean unsinkable?
This will be a family/fishing boat, with "fishing" being the operative word. Obviously safety is my primary concern. Look forward to any and all input. Thank You
 

JB

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Mar 25, 2001
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45,907
Re: 1986 17' Boston Whaler Guardian

Howdy, Yankee.

Welcome aboard. :)

Yes, I believe unsinkable really means unsinkable, and I don't think closed cell foam acts like a sponge when exposed to water. If there is water in the hull of the Guardian it can be drained, it will be in voids between the hull and the foam.

I am assuming that the Guardian is an 18'6", same as the Outrage 18 but with work boat specs. Wonderful boat, but not as versatile or as easy to handle as a Montauk. It is a lot bigger boat than the Montauk, which is almost exactly 2' shorter. 90HP seems on the low end of suitable power for that hull, only 60% of rated power. I had 150Hp on one of my (lighter) Outrage 18s, 130HP on the other. My general rule of thumb for powering Boston Whalers is at least 70% of rated power.

I have drained and dried a 13 and a 16 that had cracked hull bottoms. I drilled 1/2" holes in the keel near the stern, tilted them up and let them drain for a few weeks before sealing them up again. Neither boat seemed to lose any performance. If there is water in the Guardian I would do the same thing.

Which boat I would suggest depends on the size of your family and what kind of water you will be boating/fishing on, and on your ability and willingness to do some rehab on the Guardian.
 

swamp yankee

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Jul 14, 2007
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Re: 1986 17' Boston Whaler Guardian

Hey JB,
Thanks for the welcome. You brought up an interesting point re:power. The boat is listed as a 17' guardian, however I can only find info on 16 & 18 footers. Will have to go back out and take another look.
In my opinion she's definately worth a bit of hard work, I just didn't want to comprimise safety regarding the floatation. I checked the whaler web site and it clearly states "non absorbant, closed cell floatation foam", but with this being an older hull I just wanted a bit of reassurance.
I appreciate the feedback. Will let you know how I make out with the auction. Hopefully she'll be mine by this time next week, if so I'll try to figure out how to post some pics. I look forward to speaking with you again.

Thanks,
Yankee
 

JB

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Messages
45,907
Re: 1986 17' Boston Whaler Guardian

Well, these aged eyes finally caught the "17' Guardian" part of your title.

If the Guardian is indeed a workboat spec of the "17", which is actually 16'7", it might show as a 16 in literature.

That would be a precious jewel. Power is appropriate for that hull, but the Suzi DF90 is heavy for it at about 420lb. BW listed the max recommended transom load for the Montauk at 400lb, but the workboat spec hull might be rated higher. The heavier workboat spec 16'7" hull would indeed seem to ride low and heavy with that engine, even if dry as Death Valley. I would buy it in a nanosecond and swap the DF90 for a DF70 (356lb). A difference of about 60lb right on the transom would make a big difference. Might even get a few bux along with the DF70 if I found the right guy to swap with. :)

I had a DF70 on my 1980 Montauk and performance was excellent, as well as the wonderful user friendliness of any Suzi 4 stroke. The DF70 is very popular with Montauk skippers, and for good reason.

Take another look at her and let us know what you decide.
 

swamp yankee

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Jul 14, 2007
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Re: 1986 17' Boston Whaler Guardian

Hey JB,

I not only got too take a second look today but a nice ride on her as well. The head of the lake patrol met with me today and took me out for about an hour. He also is the man who ordered this boat 20 years ago, so I also got her history. SWEET!

I agree that the suzuki 90/4 stroke may be a bit heavy for this boat, but man does she move! I measured her out to 16'-6" and agree that a 70/4 stroke would probably suit me better. I'll keep my eyes open.

Not too concerned about the hull repair or floatation issues any longer. She seemed to handle well today. Should I keep in mind that this boat is only used in fresh water. I understand that salt water is denser and there for more bouyant. Do you think that this would make a noticable difference?

Well my minds made up. If the bidding gods are in my corner I should have her home by friday. Wish me luck and I'll keep you posted.
 

JB

Honorary Moderator Emeritus
Joined
Mar 25, 2001
Messages
45,907
Re: 1986 17' Boston Whaler Guardian

I used my Sakonnet 16 and my Montauk 17 in both fresh and salt water, Yankee, and I didn't notice any difference.

Good luck. :)
 
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