What size Engine?

[Toonribber]

Having my Rib now stored in France, I'm now using my old Yamaha 3.2 sib on and around The Dart. It has an 8 hour Evinrude 2 stroke which meets on the plane fine with 2 but struggling to do much with 4 adults.

Thinking about getting a 15 hp replacement.

Do you guys think this will give the power I need?

Will such an engine be handleable, ie in and out of car etc??

Any advice gratefully received

[Toonribber]

Obviously that was 8 hp (predictive text)!!!

[dave3235]

Originally Posted by Toonribber

Obviously that was 8 hp (predictive text)!!!

Hi

What's the weight of the 4 people.

[Fenlander]

I've used a 9.8 probably the same weight as your 8hp (around 26kg) and now use a 15hp 2-stroke (35kg). Outboards around 26kg are a doddle in most situations... the 35-38kg 15hp 2-strokes manageable but slightly more awkward on a slippery slipway or over rocks... but never a problem if you use transom wheels then lift the outboard the shortest distance from car to boat... then the boat becomes your outboard trolley.

Regarding power/performance it is boat dependant but in general there's a huge step up in readiness to plane and maximum speed when upgrading to a 15hp.

Much depends on the size of your adults though... four beefy guys and some kit can make it harder to plane with a 15hp... you only need a slightly heavier SIB with such a load and 20hp is better... if you can lift one ok.

[Toonribber]

Thanks. That's all useful . Might even look at a 20hp as it seems my family are turning into Giants!

[Fenlander]

It might be OK with how you want to operate this boat but it's on the small size for 4 adults... wonder what hp it's rated to... you could be maxing it out in all respects... perhaps a larger SIB would be a good starting point?

[Rusey93]

I have 380HD quicksilver SIB with a 2 stroke 25 and it'll do 20kts and plane with 3 adults and a kneeboarder on the back.

It's actually up for sale at the moment and if it's on the River Dart i'm in Paignton to local to you.

[beerbelly]

a 15hp should do what you want my honwave 3.2 airfloor easily pops on the plane with 3 very heavy adults on board. 2 males at 17 stone each and a 14 stone lady

[dave3235]

Originally Posted by beerbelly

a 15hp should do what you want my honwave 3.2 airfloor easily pops on the plane with 3 very heavy adults on board. 2 males at 17 stone each and a 14 stone lady

Hi

What pitch prop ate you running

[Toonribber]

Thanks beer belly that's useful.

Not sure what pitch the prop is- and fair point a finer pitch may help, but suspect 8 hp just isn't enough.

As the boat is in Devon and I'm now back in Northumberland I'll check when next down.

[Toonribber]

Ruddy 93. Sounds interesting but was hoping to only change motor at present as the inflatable is good, but will bear it in mind.

[beerbelly]

the prop is the standard size for a 2006 mercury 15hp 2 stroke sorry I don't know the pitch