Off set on fitting a new Engine

[marktwd]

I have a Ribcraft 585 and just getting a 2012 Yamaha 100 outboard to go on the back and I am aware I will need to mount the engine with a offset, maybe a inch or two, has anyone got anything more accurate as to the exact offset to help with steering and keeping the boat level when under power? thanks Mark

[matt h]

Has it been fitted with an engine before?

If not , contact Ribcraft direct and they will give you the definitive answer would be best. If its new then they can mark out the correct position

[marktwd]

It had a pair of Honda 50's on before. Thanks Matt.

[gtflash]

Typically I think it's 1" per 100hp to starboard on standard gearbox. That said 100hp isn't a monster of an engine and most British racers now mount engines dead centre. I recently had the same concern and the consensus on boatmad was middle. I have offsetted the torque of the prop with the battery, oil tank and a few little things on the right side of boat and It runs like a dream. Mines 250hp. Centre looks better too

[gtflash]

Ps mine was 2.5 starboard before I re rigged it and it payed over to port still

[jamiegolf]

It's not an ex EA boat is it? I just bought a 585 with twin 50 and going to fit a single, needs to be an xl shaft.

[jamiegolf]

[gtflash]

Originally Posted by gtflash

Ps mine was 2.5 starboard before I re rigged it and it payed over to port still

Predictive text!!!! Mine was 2.5" to starboard and it laid over to port with full trim in between 20-30knots

Rigged in centre with weight on starboard side and it now runs perfect through all trim range and speed up to 60mph

[Adam and Hayley]

Had mine moved over last year (150 on an ocean pro) It still lists under power/speed : (

Apart from the fact you have to lean to the right is there actually any disadvantage?

[henners115]

a rib craft 585 is what I'm after (currently selling my boats, bombard commando 3.8, avon sr4 and avon 5.4 if any interested)

let alone a rib craft 585 would be beastly, why are u guys changing to single?

[jamiegolf]

More efficient. My twin 50s is like a single 80 power wise.

[henners115]

but the cool factor of twins

won't the 585 take twin 90's?

[jamiegolf]

It's rated to 150hp twin 90s would take it over the limit. I do like the twins for driving it like a tank turns on the spot.

[henners115]

i have seen two with twin 90 one yams and other execs

[jamiegolf]

[emoji848]