I need a replacement alternator for my 77 YSB12 it is listed in the parts book as # 121370-77200. I called a distributor and they gave me the price of, believe it or not 900.00. I just about fell over board. any sugestions to help keep me above water and cahrged.
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Balmar High Output Alternator around $450
I switched from the Yanmar alternator to one made by Balmar. I am very impressed with the unit, (and no, I don't work for them!) It was a "bolt-on" installation. Check www.balmar.net for applications. Balmar was also very good on the phone with any questions. The regulator that I bought through Boat U.S. is the Balmar 90-100D. The alternator has 2 charging outputs, allowing it to be connected to two seperate battery banks, charging each as needed, without the battery selector switch or battery isolators. It will charge the battery bank that needs the charge most, either diverting 100 amps to one, the other, or dividing it between both banks. Pretty neat, cost through West or Boat U.S. is around $450.00 You do have to use an external voltageregulator. Balmar makes several for between $170-220. Those regulators are multi-stage, and have seperate settings specifically designed for gels, lead-acid, etc. And, the model I bought, waits to turn the alternator on until the engine has been running for 30 seconds, to make starting easier. So rather than spend $900 to replace the original, you might as well get more output, more convenience, for less money.
I switched from the Yanmar alternator to one made by Balmar. I am very impressed with the unit, (and no, I don't work for them!) It was a "bolt-on" installation. Check www.balmar.net for applications. Balmar was also very good on the phone with any questions. The regulator that I bought through Boat U.S. is the Balmar 90-100D. The alternator has 2 charging outputs, allowing it to be connected to two seperate battery banks, charging each as needed, without the battery selector switch or battery isolators. It will charge the battery bank that needs the charge most, either diverting 100 amps to one, the other, or dividing it between both banks. Pretty neat, cost through West or Boat U.S. is around $450.00 You do have to use an external voltageregulator. Balmar makes several for between $170-220. Those regulators are multi-stage, and have seperate settings specifically designed for gels, lead-acid, etc. And, the model I bought, waits to turn the alternator on until the engine has been running for 30 seconds, to make starting easier. So rather than spend $900 to replace the original, you might as well get more output, more convenience, for less money.
High output Alternators
Try http://www.high-amp-alternators.com Balmar & Yanmar sound way to much!
Try http://www.high-amp-alternators.com Balmar & Yanmar sound way to much!
price the starter 
there are many options for the alternator, but the starter is a single sorce item-- wait till ya see what they want for that item terry
there are many options for the alternator, but the starter is a single sorce item-- wait till ya see what they want for that item terry
Rebuild It
Rebuild the alt. If you don't feel like you could handle it then find a place in the phone book that rebuilds alt. & starters. The parts to rebuild are usually cheap.
Rebuild the alt. If you don't feel like you could handle it then find a place in the phone book that rebuilds alt. & starters. The parts to rebuild are usually cheap.
115 AMP Yanmar Alternator
Yanmar produces a 115 AMP alternator. It's a 'double foot' mount. Part number is 444115-77200, price is $ 309.00, we have one in stock at Torresen Marine.
Yanmar produces a 115 AMP alternator. It's a 'double foot' mount. Part number is 444115-77200, price is $ 309.00, we have one in stock at Torresen Marine.
Ike-- ya but !
at 12HP total you be wacking a lot off the avialable prop power off with 115 amp alternator. Not sure you want ta do that ?? terry
at 12HP total you be wacking a lot off the avialable prop power off with 115 amp alternator. Not sure you want ta do that ?? terry
email me, then sign up in the owners directory!
I have a 1977 h30 that I repowered, and the YSB12 is available. peteralbright@mciworld.com
I have a 1977 h30 that I repowered, and the YSB12 is available. peteralbright@mciworld.com
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