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Old 14 March 2010, 10:30   #1
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Atlantic 21

Hi Chaps

Just Got An Atlantic 21 with a 200 mariner on the back.
Shud this boat have inboard tanks as it has a tank on the back deck.
Its a project so needs work.

I know thay are good sea boats but what elce is there to know about them any thing to wach for.


Josh
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Old 14 March 2010, 11:22   #2
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The Atlantic the RNLI had used twin stainless inboard tanks, the fuel fillers were under ther crew bench seat.

Should go well with a 200 on, any photos?
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Old 14 March 2010, 12:51   #3
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Got some more will find them

sorry bit rubbish thay are from my Iphone

what sort of speed are we taking i would of said 45knot around that.


thanks
josh
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Old 14 March 2010, 12:59   #4
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some more
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Old 14 March 2010, 13:16   #5
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Looks like its more from a Standby boat.
With twin 70's on you could get 32kts, that fully loaded with three crew, and all the associated rescue gear.
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Old 14 March 2010, 16:48   #6
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I wonder what the weight difference is between that engine and the smaller twins. Looks as though that tank behind the seats could alter the trim - the Atlantic 21 did need to be carefully trimmed for best performance, and you don't want too much weight at the back end. Fuel tanks below decks and forward in the hull is likely to give you a better ride
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Old 14 March 2010, 16:51   #7
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Looks like a good project
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Old 14 March 2010, 17:11   #8
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I wonder what the weight difference is between that engine and the smaller twins. Looks as though that tank behind the seats could alter the trim - the Atlantic 21 did need to be carefully trimmed for best performance, and you don't want too much weight at the back end. Fuel tanks below decks and forward in the hull is likely to give you a better ride
The tank is in about the same position aft where the 2 underfloor tanks should be ,makes me wonder if they are still under the floor unless they were never fitted for some reason ,as chewy said it looks more commercial than ex Rnli going by the mast and the lack of fittings even if they have been removed at some stage ,,looks a bit ex military or police to me .should make a nice boat though when sorted out .
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Old 14 March 2010, 18:11   #9
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I think it is an ex rnli as on the transom you can see where it had two outboards at one point. there are to vents on the console so im gessing it has the tanks some where in the hull. has any one ever taken a deck of one. the console has been sprayed black and you can see where lots of stuff has been taken off. i like the aframe but your right it not a rnli one is it. its got henshaw tubes on it.

i saw one with a 300 promax on it so i think it will be ok with a 200.
any one done one as a project. like to see what other people had done.


what would you guys do with it then if you could do any thing with it.

thanks
josh
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Old 14 March 2010, 18:30   #10
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I'd put money on its NOT ex RNLI.
The rear seats aren't correct, the tubes have too many fittings missing, wrong roll cage.
The FRC Atlantics had twin engines fitted.

Depending on what condition its in I tidy it up and use it, not too sure about the fuel tank though.
The 21 is my favourite RIB.
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Old 14 March 2010, 21:26   #11
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the artics I used to use when I was in the Fisheries used to have 2 on deck mounted tanks mounted betwen the twin 70's and the lifting frame so may have been along the same idea

Graeme
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Old 15 March 2010, 01:15   #12
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Off topic a bit, but were the twin 70 Johnsons contrarotating?
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Old 15 March 2010, 01:22   #13
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Looks great.To trim it correctly, to it on the water you can use plenty of anchor chain or as you are in the same town i have plenty of lead diving weights i bought for this very purpose if you take care of them for sea trailing the boat you can move them forward and aft to get the best balance.a lot of us have done the pacific 22 as projects as they have been available. I,ve sent a pm as well Regards Peter
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Old 15 March 2010, 01:36   #14
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Off topic a bit, but were the twin 70 Johnsons contrarotating?
Hi Nos,I know one around here that has twin 60hp two stroke mariners and they were original they were not counter rotating just normal
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Old 15 March 2010, 01:40   #15
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Off topic a bit, but were the twin 70 Johnsons contrarotating?
I believe they were not. Most fleet operators tend to stick with one standard engine setup even with twins so that they maximise their flexibility to move engines from boat to boat as and when required
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Old 15 March 2010, 01:44   #16
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I believe they were not. Most fleet operators tend to stick with one standard engine setup even with twins so that they maximise their flexibility to move engines from boat to boat as and when required
Cheers.

Reason I asked is someone on another forum has just had a replacement lower unit stuck onto his '90s Johnson 60 and it appears to be contrarotating. I'm wondering if he's got hold of an ex RNLI 70hp box as it's quite a small engine to be contrarotating.
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Old 15 March 2010, 04:56   #17
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Cheers.

Reason I asked is someone on another forum has just had a replacement lower unit stuck onto his '90s Johnson 60 and it appears to be contrarotating. I'm wondering if he's got hold of an ex RNLI 70hp box as it's quite a small engine to be contrarotating.
The RNLI engines both spun right handed props. Alot easier for carrying spares and no chance of fitting one then going astern when you should be going forwards.
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Old 15 March 2010, 05:40   #18
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The RNLI engines both spun right handed props. Alot easier for carrying spares and no chance of fitting one then going astern when you should be going forwards.
Ahhh! All becomes clear-ta!
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Old 15 March 2010, 05:41   #19
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No worries.
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Old 15 March 2010, 14:43   #20
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Im picking it up mid april i think im going to gut it and give it a full rebuild.
can you still get the air bottel at the back as its very out of date 12/1996

has any one got pics of there ones

Thanks
Josh
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