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can I use a a12 for an inboard boat?
No life (a.k.a. DattoMaster)
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Sorry if I should have posted this in of topic but im looking at making a 10-12ft v hull boat. Acording to the wiki an a12 can rev at 5500 rpm all day and I think with an oil cooler and sufficient coolingi can bring that up to atleast 6000 rpm. A stock a12 is rated at 69hp@6000 rpm and has about 95nm of torque. Looking at 60hp outboards they seem to have around the same hp and torque rating as a a12. Now all I have been researching tells me that the a12 can be used as a marine engine. Am I missing something? I know this is a car forum but im hoping there might be someone who can shed some light. My plans are to supercharge and turbo charge a stock a12 with with a oval port head

Posted on: 2014/10/25 7:57
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Re: can I use a a12 for an inboard boat?
Home away from home
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had been done. A14 though not a12. so it definitely doable.

http://datsun1200.com/modules/mediawiki/index.php?title=Boats

Posted on: 2014/10/25 12:53
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Re: can I use a a12 for an inboard boat?
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L series boat thread. so i see why not on A series.

http://community.ratsun.net/topic/25147-datsun-boat/

if you blowthrough supercharge it, dip the intercooler in water. super intercooler, unlimited coolant LOL

Posted on: 2014/10/25 13:01
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Re: can I use a a12 for an inboard boat?
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Is it possible to use lake/river water as cooling just like any jetski or outboard? I'd assume salt water would destroy in no time. But is it a possible thing with fresh water? Obviously using a filter :)

Sounds like a cool idea and with supercool supercharging.

Have you found what weight difference is between the similar power outputing outboard motors you found and the a series, Matt?

Posted on: 2014/10/25 21:42
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Re: can I use a a12 for an inboard boat?
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Yes you can use whatever engine you want as a marine engine. It would be best to use a closed cooling system but not absolutely necessary, you will need an additional water pump that you could get from a mercruser or get a new jabsco item.

Posted on: 2014/10/26 1:33
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Re: can I use a a12 for an inboard boat?
No life (a.k.a. DattoMaster)
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Well I was thinking a 10ft wooden or fiberglass vee bottom, a12 supercharged and turbocharged just like I think the ma09ert Nissan motor. I was hoping the supercharger will get my low down boost and the turbo kicks in later. To what rpms I haven't looked that far. I have looked at 60hp outboards and the torque seemed to be almost the same. Everytime I look at modding something the strong little a series seems to always be a good reliable option. I cant see this being any different. I was thinking of using a water to water heat exchanger and adapting a v8 water cooled exhaust manifold with a simple adapter on the head. Do u think this would be sufficient to keep the temp down in the engine compartment?

Posted on: 2014/10/26 9:45
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Re: can I use a a12 for an inboard boat?
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no point in adapting the mercruser manifold, intake would be in the way and the spacing is way off and they are #OOPS#! if you are turbocharging you would be better off making a mixer after the turbo or just wrap the pipes and dump the exhaust over the transom. what drive system are you going to use?

Posted on: 2014/10/27 10:00
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Re: can I use a a12 for an inboard boat?
No life (a.k.a. DattoMaster)
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Not sure. I would like to fiddle around with a jet type system maybe from a jetski. Also what do u mean by mixer? Is that a section of pipe that is water cooled and would bolt to the exhaust manifold flange? Excuse the questions but im still learning boats :p

Posted on: 2014/10/27 10:16
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Re: can I use a a12 for an inboard boat?
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In turbo marine engines the mixer is a pipe that introduces your raw water (sea water) into your exhaust after the turbo for muffling, cooling and an exit for your raw water. there are a few things to be considered when setting this up.
#1 exhaust angel: you must have a vary steep exhaust angel after the turbo as you don't want water draining back into your exhaust ports.
#2 aqua lift and or flapper valve: an aqua lift is a great muffler and will stop water being forced back up the system on deceleration and reversing. the flapper valve will just help prevent water going up the exhaust.
i personally would keep away from the jet ski stuff and use a direct drive with a soft clutch.

Posted on: 2014/10/27 11:21
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Re: can I use a a12 for an inboard boat?
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A series = boat anchor.
Levey would be best to ask any naughtical questions about seamen and blowing seals.

Posted on: 2014/10/27 21:03
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