and WELCOME TO THE FORUM, POST NUMBER ONE!!
Sadly you have over 250 views and no response, so I will try:
This answer is two levels, because I have the Helia 44, your smaller cousin... But I have studies the SABA for a year and been aboard one a couple of times.
My Helia has the 55's, an upgrade for the Helia 44, but perfect in my view.... Your Saba 50 is about 20% larger and heavier... HOWEVER
I have mixed feelings about the 75's, as all they are is the Volvo
55's with turbos added. That is more heat stress on the same basic engine
, so temperature gauges like I show on the Topic "Improvements to the Helia 44", those temperature gauges PLUS Alarms
, would be mandatory in my mind...
Now my Helia 44 is a bit over gunned with the 55's, a bit... But I like that. At 2400 rpm
I am doing well OVER 7 knots on one engine. Like if I am not bucking a headwind or current
I can see 8 knots on one engine at 2400 rpm
At 2000 rpm, no wind
I am cruising at just under or even 7 knots, on one engine... In a hurry? I only get 9 1/2 knots in perfect conditions on two engines, one engine is the go anyway... You will NOT get those speeds with the SABA on 55's on one engine, you will be a bit slow. This means weather
IMO you will do that well with the SABA, with the 75's. The problem is you will be a bit too slow with 55's, and have to run both engines on the SABA if you have the 55's, so the one 75 running will actually be more fuel
efficient as you will be able to run on one engine at good speeds. With the 55's, IMO you are only going to be going 5 1/2-6 knots (if you are lucky) on one engine with the SABA, and that is not enough for me..
I do not like to be weather
dependent. For instance, we have an early weather shift, due to "El Nino" and my Wife had a problem to deal with and I had to get home 600 NM during a lull... I mean dead air, like 10 days of no wind
or light wind on the nose and I was bucking a current. I just turned on the motors and ran home on my "iron jib" during almost all daylight hours... In 8 days I was behind Fraser Island from Airlie Beach, stopping along the way seeing outer islands... My longest run was dawn at 1770, til about an hour after sunset to Kingfisher Resort, about 90 NM on my course from memory. It was no stress, good fishing
, trolling the whole way, and the best fishing
is at about 7 knots any way.
You will be hard pressed to get 7 knots out of a SABA on one motor
with the 55's, like never.... I had no wind, and just ran her home. A cat cruising with us, did not have big motors, carried little fuel
, and they were 3-4 weeks behind us because of needing the weather. They were stuck long periods of time in undesirable anchorages
waiting for favourable winds... No thanks, I want to go when I am ready. What I did in about 8 days they were 6 weeks battling... NO thanks..
Weighing it all up, I would go with the 75's, and after market temperature alarms I could set at lower levels.... I think you would be impatient and slow with the 55's.... Diesel
, engines are good for 7500 hours, sail drives for 3500 hours before overhauls, my January 2013 Helia is fairly well traveled and has 730 hours on the engines in two years cause I like to fish
trolling. Caught about 50 major fish
just this year, 8 1/2' Sailfish, 6' Black Marlin, Kingfish a meter and more, Mackeral, Queenfish, 60-70 lb Giant Trevally, all sorts of fish. Sail is the best, but Iron Jibs are great in light air, no wind, beautiful flat seas.... If I ordered a SABA, and I could, and I might, I would get the 75's for sure.....
Kind regards, Helia 44, AVALON