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Old 15 April 2004, 21:08   #1
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Pacific 22 needs new engine!

Hi all,

Need some advice from P22 owners, I'm looking at a P22 with no engine or leg, what should I put in it's place and how much power should I go for? The boat I'm looking at has had the engine box moved right aft, any comments on this re trim / balance?
I was thinking about a marinised version of the GM 6.5turbo engine, has anyone come across this engine and have an opinion on it? V8 diesel, 6.5 turbo, 225Hp @ 3800, 385Kg marinised, this looks like the upper limit for the sternpower 101 leg. Incidentally there are more powerful versions available, up to 285Hp Samurai dersels
Would anyone advise me to go for a different make of leg, given that this is a blank canvas so to speak?

Thanks for your comments in advance, and thanks to all for your input to this forum - I've learned a lot, this will be my first rib been in hard boats till now.

Roohairy
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Old 16 April 2004, 04:06   #2
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Roo, regarding the GM Diesels, you might want to have a chat with John Fuller over on Boatmad who has a speedboat with 2 of them in it. Although those of us of Ribnet think it needs a set of tubes to keep the stern up a bit.

http://www.boatmadforum.co.uk/

Also worth having a look at:

http://www.dieselenginetrader.com/In...tion=home.home

The easiest engine to put in it would be another Mermaid Turbo Four and Stern Drive. However I would certainly check the max power for a Sternpower before connecting up the GM. Try Mermaid they are a great source of information and have a brilliant Onwers Club with 24 hour assistance for 15 per year. Mermaid are at:

http://www.mermaid-marine.co.uk/home.htm

If you are after a cheap Mermaid and Sternpower then Jamie at Extreme Marine Ltd will probably have what your after, although you will need negotiating powers of Henry Kissenger to get a real bargin out of him.

http://www.boatsandoutboards.co.uk/broker/EML001

Let us know how you get on with the purchase.

Regards Pete
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Old 16 April 2004, 07:55   #3
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Thanks for your replies Pete. How much space is there in the standard P22 engine box, does it have to be a 4 cylinder engine for length? Found a few 6 cylinders going cheap last night. Advantage of the GM V8 is that it's practically the same length as a 4 cylinder, but more power. From the specs on Lancing's site, a 101 sternpower leg should be ok with 225Hp but I haven't spoken to anyone about it yet, not in UK at the moment.
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Old 16 April 2004, 16:30   #4
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Roo, not sure about 225 hp, I have the manual and seem to remember doing a calculation that came out at 175 hp tops, but it depends on the revs. There is always a few turbo fours about because the Fairy Owners use them as well. Mermaid have a factory of used engines too.

Loads of room in the engine bay and it will take a six easily. There is a jack shaft to the stern drive so this could easily be shortened for a six. Neville has chopped an engine box down to give 12" more room athough even more is possible.

Pete
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Old 16 April 2004, 16:44   #5
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Thanks for yet more info pete, the GM engine reaches max power at 3800 rpm so it's a good bit faster than the mermaid as long as I can get a prop to suit without a reduction gear.... need to talk to the someone who actually knows what he's talking about first though - Lies, Damned lies and statistics to quote someone famous but I've forgotten who! (Disraeli??)

Roohairy

Just realised that this looks like I'm saying you don't know what you're talking about, didn't mean it like that was referring to my limited knowledge!
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Old 16 April 2004, 17:13   #6
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Roo, no problem mate. Recon you need to speak to cyril at Mermaid, font of all knowledge and helped me a few times even on a bank holiday weekend!

Pete
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Old 16 April 2004, 18:08   #7
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GM 6.5turbo engine

Hi Roohairy
Forget the samurai deisels, they are a bit suspect in the build quality, they seem to be OK for vehical conversions, but heard a lot of bad reports when fitted into boats.

I am going to later fit a GM 6.5 V8 300 hp to mine but from this company www.marinediesel.nu and fit it to a Merc Alpha 1 or Bravo 2 outdrive and go for 300 hp, i have seen the 300 hp engine in the flesh and it look the dogs b*locks almost to good to fit in a boat.
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Old 16 April 2004, 19:55   #8
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Thanks for the tip Ian, who is the UK agent (web links not working) and where are they based? Do you know what they charging? I've got a limited budget as I haven't sold my other boat yet!
I haven't heard anything bad about Samurai in relation to vehicles, and haven't come across any comments at all about their marinisations. In what way are they bad?

Roohairy

Found the UK dealer, marinemaintenance
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Old 17 April 2004, 03:45   #9
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Quote:
Originally Posted by Ian Austin
Hi Roohairy

I am going to later fit a GM 6.5 V8 300 hp to mine but from this company www.marinediesel.nu and fit it to a Merc Alpha 1 or Bravo 2 outdrive and go for 300 hp,
Your obviously not intending to do much boating if you plan to use an Alpha 1 on a 300hp "marine diesel". Might be wise to fit a large bow eye and invest in a good quality tow rope.

The importer of these motors are based in Hamble Point marina, Marine Maintenance are only dealers for them.
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Old 17 April 2004, 16:00   #10
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Ian Austin - thanks for the warning, can you tell me exactly what the problems were, privately if you wish? I've only come across them from Landrover re-engining and they seem to do quite well at that, can't find any feedback elsewhere at the moment, trying to trace Jon Fuller's threads on boatmad but waiting for my log-in.
Have you got a firm plan for putting a GM in?
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