I tore her down and want to get it running for my father in law. This motor has a lot of sentimental value because he built his boat with his dad, his dad passed and he is now 70. Here is my current bore size? I measured about 3.0625, but this is not a mic, it's def larger than 3" and I thought they were 3"
Parts are non existent for a 1959 RD-21 but they make them for 1958




Parts are non existent for a 1959 RD-21 but they make them for 1958






