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Old 16 April 2013, 04:27   #1
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Country: Australia
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Zodiac Grand Raid Mk2

G'day Everyone,

First timer here. Got a few questions regarding the zodiac grand raid mk2 (3.8).

Will be using this SIB for cruising/hooning around the water and a bit of fishing. Currently looking at outboard 2 strokes and there are many out there to choose from. But at the end of the day, there all the same if not much of the muchness.

Going off from the specs on the zodiac page, it requires a long shaft. What do you guys use long or short? pros/cons

HP size. Thinking of 30HP (tiller) at the moment but at the same time, I wouldn't mind a 40HP remote steer. Due to weight of the 40HP (72kg (30HP 51kg)) and the zodiac (83kg + cargo) keep thinking that it's too much. What do you guys think? I'm not racing it but I do like to go fast when I can. Is 30 sufficient?

Which brand motor? Leaning towards the mercury at the moment.

Options/ your 2cents???

Most of all, post any pictures/links of your/peoples setup. E.g forward steer, seats, accessories or mods.

Much appreciated

Cheers
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Old 16 April 2013, 08:49   #2
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Boat name: White Hurricane
Make: Zodiac Hurricane
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Hey mate, 30 horse is perfect for that size SIB. I used to have a 20 horse mariner on a zodiac mk 3 GR(4.7m) ,and it went well. I now have a 25hp Tohatsu on a 4metre RIB and it flys! It's light enough to take on and off if you need. By the way, all I did with my tohatsu 25 to make it a 30,was to remove the restricter at the intake pipe on the carby and had it tuned to suit. Tohatsu are identical motors to mercury, they must come out of the same factory. I had original zodiac forward controls on my grand raid but with the bit of movement you can get in SIBs I find it a lot more comfortable sitting on the tube operating a tiller steer! Plus you have a lot more deck space for fishing gear, crab pots etc. How old is your boat? On some older boats the floor fabric stretches it can make the floor boards seem loose even when it's pumped up to pressure,so it can porpoise in a bit in chop. It's called the "grip" of the boat and you can rectify it by shimming out the floorboard a bit at the transom. Anyway mate I won't bor you anymore. All the best. Todd. P.s the "grip" of your boat should be about 30mm for a mk2. Which means all your floorboards should measure 30mm more than the measurement of the inside of your boat, from where the floorboards touch against the transom and the fixed board in the bow, so it stretches out the floor fabric and locks it all in,together with the correct air pressure. About 3.5 psi. Pretty sure your boat is a short shaft transom. And last of all I put a 4 blade stainless prop on and it's way better than the original alloy one. Cheers
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Old 16 April 2013, 19:34   #3
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Country: Other
Town: Lima-Peru
Boat name: Nautile
Make: Sea Rider Boats
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Engine: Tohatsu 18 /30 HP
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Grand Raid are for short shaft (15") engines. A long shaft on a short shaft transom will produce unwanted water splashes over or out back transom that must be corrected or engine/sib combo will have excessive water tail drag.

Happy Boating
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Old 16 April 2013, 19:51   #4
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Quote:
Originally Posted by Locozodiac
Grand Raid are for short shaft (15") engines. A long shaft on a short shaft transom will produce unwanted water splashes over or out back transom that must be corrected or engine/sib combo will have excessive water tail drag.

Happy Boating
A few years ago Zodiac changed the grand raid. They got rid of the intercomunicating valves and went to a long shaft transom.
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Old 16 April 2013, 22:09   #5
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Cheers fellas!

Todd: good info you got there. Not boring at all. Need as much info as I can from experience boaters as this is the first SIB I've had. Its a mk2c milspec 2002 and zodiac don't give you much info as dimensions and useful facts for them. As old as it may be, condition is pretty good. Just needs a repair on the bottom of the transom. Easy done but time consuming. Got some issues with the flooring and I need the dimension on the second board with the hole cut out for the keel valve. Anyone??? The wooden board I have seems too long and the SIB needs to be stretched at least 6 inches (which I can't). Odd but could be for the next model up flooring. It can be easily trimmed down to suit but before I do, I need to confim it to save any issues later down the track.

As for the motor. Can anyone give me a run down on the mercury 25 seapro compare to the 30 standard. As far as I can see, only difference according to the info is that seapro can withstand a bit more abuse??? Same block as the 30 only restricted and price difference is 21bucks.
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Old 17 April 2013, 19:01   #6
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The new 25/30 Mercs are made in Japan by Tohatsu. Both models are exactly same, both shares same 430 CC block and weights 52 Kg. Go straight for the 30 model as the 25 is just carb & timing restricted. Check Tohatsu Australia, will cost less.

Happy Boating
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Old 19 April 2013, 01:06   #7
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Originally Posted by Locozodiac View Post
The new 25/30 Mercs are made in Japan by Tohatsu. Both models are exactly same, both shares same 430 CC block and weights 52 Kg. Go straight for the 30 model as the 25 is just carb & timing restricted. Check Tohatsu Australia, will cost less.

Happy Boating
Cheers matey. Seems like the 30 is a goer. One more thing. What prop and pitch you guys recommend? Different application different prop.
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Old 19 April 2013, 05:57   #8
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Hey pineapple , if you can have a look at the inflatable surf rescue boats on the beaches at there props. Or call Peter Hallett at mid coast marine on the gold coast( burliegh). He decks out the IRBs for surf rescue. I bought a 4 blade stainless prop from him. It was slightly used. They cost a bit but go like the clappers! All the best mate. Todd
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Old 20 April 2013, 10:47   #9
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Quote:
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Cheers matey. Seems like the 30 is a goer. One more thing. What prop and pitch you guys recommend? Different application different prop.
You'll be alright with the prop that comes factory delivered with that engine. We use a 420 sib with 4 mates with same Tohatsu 30 HP and that combo planes in just 1/3 throttle. You need an induction tach to play with prop pitches, it's not a wild or asking guess as you could ruin your horse...

Happy Boating
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Old 28 April 2013, 04:09   #10
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Sorted! Took it for a run with the mercury 30hp and it cruised with 3 ppl with ease. Considering that it was still tight and a long way from breaking it in, at 1/3 - 1/2 throttle it planed easy.

Mate just got a hydrofoil (se sport 200) but his is a aluminium tinnie with a 30hp. I was wondering if its worth putting one on mine (planning on loading it up and doing a big trip).

What do you guys think?
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