I've been talking on the board for a while now about the genset that I am building for my boat. It is based on an old Fischer Panda unit that I bought for a few bucks as scrap. The original alternator was 24v and was trashed but the Kubota engine and the soundproof box are in fine shape.
So I decided that it would be advantageous to rebuild it with two replaceable alternators rather than trying to re-instate the original package. Three reasons were the immediate cost, the fact that I never got the original charge controllers with the unit and the capability to effectively maintain the end result myself wherever I may be in the world.
The generator part looks like this:
The large round flange mates exactly with the engine and centers the whole add-on. The components that were used in this construction are:
The ratio of drive to driven is 2.7:1 so when the engine is running at 2000rpm the alts will be running at 5400rpm. The alternators have twin cooling fans which are straight-bladed enabling the alternators to effectively run counter-clockwise. And then I grafted a Jabsco pump identical in spec to the original electric driven one in here:
The pulley that drives the pump is a Mi-Lock which is a mini Taper-Loc that allows the pulley to be positioned anywhere along the shaft and tightened right there.
Members may remember that I asked the question about the cooling implications of having a pump after the heat exchanger - well this is that pump. I have found a decent solution to the routing of the pipes so it's all good.
The alternators are generic Bosch 120amp units that are used widely in a range of European cars (BMW, Volkswagen, Opel) and should be available just about anywhere in the world. I am also told by more than one Auto Electrician that these particular models are very robust and give very little hassle.