IMHO the IGM is underpowered for the 8m catalac, but was used as a replacement for the old dolphin engine due to size constraints.
The problem with both the 8m and the 9m is the position of the shafts (and their angle), and the space in front of the shafts.
One solution is to fit saildrives, and most of the 900s did this, but in order to allow the boat to take to the ground without crunching the saildrive
, it has to be fitted at the back of the engine compartment, and this unbalances the boat.
1GM is 9 hp and weighs 156 ilbs
The Yanmar 2GM
is 15 hp and weighs 227 ibs
The 3 is a 3 cylinder these days and pushes out 22 hp and weighs 266 lb.
I have known a 9m with 2 x 22 hp engines. makes a fair difference in bad weather
, but the additional fuel
requirement and all that weight aft badly unballances the boat.
IMHO the beta range are a better engine for this:
Beta 14 at 13.5 hp weighs 196 lb
the 16 at 16 hp weighs 205 lb
and the 20 hp weighs 233 ib quite significant savings (and cheaper spares!!!!!!!!!!)
The biggest problem is costs for an upgrade unless the engines you have are no longer reliable, it is not really a cost effective solution to change 2 engines.
I have suggested on another thread another potential alternative which may be cheaper. take out the centre cockpit
locker and install a diesel generator
, then fit electric
drives to the two shafts. I havent costed this, but reckon that this may provide some considerable savings. It must be cheaper than saildrives, it will be lighter, it will provide power for all sorts of other purposes.
Furthermore, the engine is accessible, which unless you are a very thin monkey with very long arms is not really the case at the moment.
If this had been available when I changed my engine, I would definitely have gone this route
A 12m project
boat - they are nice boats and at the right price
and at the right time, I would have been interested, but I dont have the time to do it at the moment or the space. Instead, I am working hard and saving my pennies for something I can get afloat on immediately. I am still peeved about that Prout that you offered to look at for me. They rejected my offer - spurned it really, and despite my telling the broker that I would remain open if they changed their mind, they sold it 6 months later for the same price
I offered to somebody else - peeved doesnt even come close.