Howdy from Houston! Our 1982 H54 is still sailing, but the alternator went out. The Universal dealer want $700+ for a new one, but we can buy a replacement for around $75 - the question is - what is the correct make and model number for the alternator. The engine is a Universal Atomic 50 -which is really a fine Kubota tractor 44 hp diesel engine, with a Universal sea water cooling jacket. I did find out that the alternators are made in Korea, and are of high quality, but the one I bought online has a 15 amp output, and the old one was about 12 amps or so. This would fry the batteries I think. I sure hope someone can tell me the correct info on this! Many thanks from Texas, JHT