How fast is a 3.5 hp motor

Speeds achieved with 3. Hello, I have to replace the outboard on my Olson I would like to replace it with a 3. However, I am concerned that the 3. I am planning to do some of the offshore races this year HMB, Drakes, etc. Does anyone have any experience with the 3. I'm curious if a boat similar to mine has been able to achieve those speeds, though obviously the conditions and type of boat will affect things quite a bit.

Many thanks! Tom Rock On. Btw, if there are any other Olson 25 owners in this forum, another little tidbit about the 3. The reason is that the 3. My solution with my previous 6hp was to tie it to the post and wedge it between two fenders -- pretty good, but not ideal.

Join Date Jan Posts 2, Originally Posted by grizzly. Rock On. Join Date Sep Posts 3, While I think several of these rules are silly. Since DM has an inboard and the prop stays in the water, she can probably motor out of there before she hits the bricks.

With an outboard of ANY horsepower I think you're screwed, since the prop will only be in the water about half the time. The four hours is to get you back inside the Bay. In theory. It looks fast at least! Log in. Boats and Watercraft. Watercraft Engine Maintenance.

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Q: How fast will a 3. Write your answer Related questions. How fast will a 40 hp mercury motor go? How fast does a brush motor go? How fast can a horsepower boat motor go? How fast can a 8 horsepower boat motor go? How fast will a lb boat go with a 20 hp motor? How fast will a 2. Our Avon Airdeck does about ten knots with just me on board with a 4 hp outboard. It used to struggle to get onto the plane with a 3. The dinghy is an old Waveline 2.

JumbleDuck Well-known member. Three knots flat out, two knots cruise. Andrew G New member. My Achilles inflatable, with me kg , easily gets up onto the plane with a 4HP outboard. In Oz there would be many with nothing less than 25HP — it is that first 5m acceleration that keeps you out of the jaws of a croc.

Laurie Member. Tranona said:. Last edited: 2 Mar Laurie said:. Re the planning bit, I beg to differ. I have a 3 metre 2. Zodiac RIB 9 my yacht tender , light enough to be carried on my own: will plane with 2 adults and a little kit with 8 hp Tohatsu.

The Bic is quite a light dinghy being polyethylene and flat bottomed, in flat waters it should plane easily with 3. But in a chop or at speed it is likely to be wet as it has little freeboard. I find the same with inflatables, they throw up a lot of spray in anything but a glassy calm so speed takes second place to comfort - I hate arriving at the boat already soaked through!

There is a world of difference between your RIB plus 8hp and a dinghy with 3. Exactly the point I was making, if you want proper planing performance you need a set up like yours, which I would suggest is not practical for a cruising tender on a ft yacht unless you have the gear to handle it. I'm not sure quite what you mean by "gear to handle it"?

I have none, it is a light weight tender for two adults and kit, or more when required then it wont plane! It is easily lifted by one adult.