Original was MD7A 2 cylinder Volvo. Temporary refitted with Universal diesel, not sure of engine number, but 25 hp, 3 cylinder.
Love the extra power of the universal and the closed cooling loops.
Time for a new engine, transmission, and engine room design.
some questions:
1. what is your suggested motor for the S2?
2. what are your thoughts about mounting the new motor horizontal, lower into the engine compartment, and using a CV joint prop shaft? I'd like to lower the center of gravity as low as possible.
3.I'd like a new transmission as well. What do you suggest? The S2 has a slight cant to port on the shaft tunnel, I think to balance the prop walk to starboard.
I would use the Beta 20 (BD722) with 2:1 TMC40 transmission in this boat. This will give you all the power that you can usefully use and still have a very good reserve of power.
Your engine room design is really not too bad and with the high level dipstick and on your new Beta, you will find servicing much easier. We do provide a flexible coupling with the engine. I really dont think that you have the room for a CV joint system such as an Aquadrive. The new engine is lighter that the old Volvo and the Universal.
I believe that the shaft would have been slightly offset to allow the shaft to be withdrawn past the rudder skeg as opposed to anything to do with prop walk.
I believe you are right about the shaft tube alignment. When I installed the Universal, I was not aware of this potential issue. The Universal and ZF transmission were opposite rotation than the Volvo, and it made the offset a real issue. I also used a three blade Michigan prop.
This is one of the reasons I thought about using a CV joint and thrust bearing system, rebuilding the shaft tube parallel to the midship line, eliminating the offset.
The reason I'm asking about the weight is not only for the Center of Gravity effect, but also the weight distribution fore and aft. The boat is stern heavy, and bow light. The previous owners had 50 pounds of dead weight in the bow.
My fuel tank will be removed from the engine room in all cases, and two saddle tanks will be installed on the beam, under the seats. So there is room to move the engine forward, and or relocate the batteries to the engine space from the aft cabin storage (which is also a must for me). I have struggled with the battery compartment for too many seasons...lol.
I truly do want a neutral balanced boat with a very low CG, with tankage (water and fuel) to balance loads as I see fit.
Thoughts on the above? Always looking for informed opinions!
Moving the new engine forward within your engine compartment will not be enough to drastically affect the boats trim and the Aquadrive system and small bulkhead will cost a lot of change.
I think that there is nothing wrong with the old standby of adding a bit more chain to the anchor rode to adjust the trim although there are pure racing sailors who will disagree with me.
If the RH propeller is a problem for you, we can use a TMC60 transmission as this is designed to work with either a RH or a LH propeller. This transmission is about 12lbs heavier and is larger than the TMC40 and is quite a bit more expensive.
