Manufacturer of SD 505 engine drive compressors were Sankyo and Sanden. There are no small engine driven compressors produced for these boat refrigerators, all were designed for automobile and industrial equipment
air conditioning. The SD 505 was used on mostly small cars like VWís . Large SD compressors like the SD507, SD508 and SD510 were used in larger cars, farm equipment
The SD 505 is available from many parts companies but all SD505ís are not the same so identify the configurations of your unit first:
1. The line connections are either Flared or use O ring fittings.
2. Refrigerant servicing connections are on top in front of lines or there are no servicing connections on compressor.
3. The electrical
clutch coil is either 12 volt or 24 volt. If your boat is 12 volt make sure the compressor you buy is 12 volt.
4. The other SD compressors would work except they are longer in length and will not fit in your mounting bracket.
has new SD505 compressors and good picture links to the above differences in the 505 configurations.
SCS Frigette Headquarters in Fort Worth Texas
has new and remanufactured SD compressors.
JC Whitney also may have SD 505 compressors.