[PCW] Power-Cats and the Volvo IPS or MerCruiser Zeus Drive systems

[Roger Bingham]

Tim et al

The figures quoted are not really a fair comparisons for these engines.

The nomenclature for the Volvo Penta IPS drives represent the hp equivalents
of standard shaft drive installations therefore:-

The IPS 350 should be compared with a 350hp installation not a 260hp
Equally the IPS 600 should be compared with a 600hp setup not a 350hp

The Yanmar 6LYA-STP at 370hp weighs in (dry) at around 600kg

These comparisons together with the proven advantages of "pod drives" makes
them a better proposition than Tim's figures suggest.

Also these big engines would be fitted to big, planing cats and as such
represent a more acceptable proportion of the total mass of the vessel.

Yes?

No?

Regards

Roger Bingham
France

 
> Rob,
>          We have looked at these motors and they certainly have many
> advantages, except
> one which is important to cats generally, weight distribution.
> 
> IPS 350 (260hp) weighs 790kg
> Yanmar 6BY220Z (260hp) with gear 365kg
> 
> IPS 600 (435hp) weighs 910kg
> Yanmar 6LY28STP (440hp) with gear weighs 558 kg
> 
> Times that by 2 motors and fitted onto the stern of the boat, equals
> excessive.
> 
> 
> Tim Jordaan