SPEARFISH 550/18

5 adults

15mins
to assemble

36kg

79lbs

18ft  550cm

Product           Performance           Outboards

 

Product

The second boat in our range, the SpearFish 550, is a metre longer and 11cm wider than the popular 450. Because of the way volume works, that means the internal space and carrying capacity is about 50% more.

Eagle-eyed mathematician readers may also spot that 11cm is not quarter of 100cm (1 metre), ie. the increase in beam is proportionately less than the increase in length. So where the 450 has a 4:1 length to beam ratio, the 550’s is 4.5:1: it’s even more efficient.

As larger boats are likely to be used in rougher weather, we also increased the depth of the V in the floor at the bow, and continued with some shape all the way to the transom. The 550 then is still not for crossing oceans but it really is very effective at powering into a “wind against tide chop”.

Our DESIGN and QUALITY pages give more information about the SpearFish's excellent shape and production.
 

Compare  models

SPEARFISH 450/15
4.5m
1.1m
34cm
28kg
450kg
3 adults (2 & 2 kids)
6hp
80x50x40cm

SPEARFISH 550/18

5.5m
1.3m
34cm
36kg
600kg
5 adults

10hp
95x60x50cm

SPECIFICATIONS
Length
Beam
Tube diameter
Hull weight
Weight Capacity
Person Capacity
Max engine
Folded size

Colour
options

Red with light grey canopy

Mid grey with light grey canopy

Green with green canopy

 

Performance

While it still works very well with a lightweight, portable 6hp motor (or 1kW electric drives for inland waters) the 550 is capable of taking larger motors, up to 10hp. If you can deal with the weight on land – eg 37kg for a Tohatsu 9.8hp - a 550 thus equipped is a very capable machine. It’s not all that much faster flat out (unless you start tinkering with propellers), but a twin cylinder 9.8 producing 6hp is very relaxed compared to a single cylinder 6hp motor producing its full 6hp.

Mid grey with light grey canopy

Green with green canopy

 

Outboard choices

Outboard motors up to about 6hp are a comfortable one-person lift (13-27kg); anything larger than that can be a struggle. But the 550 does go very nicely with a 9.8… Your choice of motor will depend largely on what you want to do with your SpearFish, but here are some of our favourites:

SpearFish 550 with Suzuki 6
Engine weight 23kg
If portability is a high priority then this is probably still the best petrol engine combination for the SpearFish 550, fast with one on board, not much slower with two, and adequate for three.

SpearFish 550 with Tohatsu 9.8
Engine weight 37kg
Nicer on the water than a 6, but of course a little more difficult to move about on land. If the weight is manageable for you then we’d certainly recommend a 9.8 if you’re usually going to carry 3 or more adults.

SpearFish 550 with Epropulsion Spirit 1.0
Engine weight 18kg
An electric option, reaches speeds up to 5.5 knots (more than most river/harbour limits) and at 4 knots should have a range of at least 10 nautical miles (probably 12 or even 15nm, depending on conditions/load). Beautifully smooth and easy to use, and astonishingly quiet (quite possibly quieter than paddling, at paddling speeds!). The Torqeedo 1003 has similar characteristics, and is better known than the Epropulsion, but not as quiet.