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stock prop for Mercury 9.8, 2 stroke motor
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<blockquote data-quote="cwphoto" data-source="post: 365434" data-attributes="member: 14437"><p>Thank you. That seems all too obvious! I was thinking that the diameter would come first. So, is there any logic to the numerical part of this? A1 indicates what? I Do know through further research that this is an 8 3/8" dia. but how that relates to A1, no clue on the logic there. </p><p></p><p>When I talked to a marine shop about this, they came back with part number 032020. This is a 9 inch diameter by 7 inch pitch. An online manual indicated the stock prop was 8 3/8" (Now obsolete) so not sure how a 9 x 7 compares to an 8 x 8. </p><p></p><p>I'm sure there must be a formula for figuring this out, but I'm assuming one would need to know the gear ratios. I may just throw the 9 x 7 on and see were my RPMs are too. I can't imagine there would be a huge difference between and 8 3/8" to 9". </p><p></p><p>Motor also has a 17 1/2 inch shaft, which I've never come across before. I thought there was just a standard short shaft ( 15 inches) and a long shaft ( 20 inches), and a few extra long for special applications. </p><p></p><p>Thanks again!</p><p></p><p>Troy</p></blockquote><p></p>
[QUOTE="cwphoto, post: 365434, member: 14437"] Thank you. That seems all too obvious! I was thinking that the diameter would come first. So, is there any logic to the numerical part of this? A1 indicates what? I Do know through further research that this is an 8 3/8" dia. but how that relates to A1, no clue on the logic there. When I talked to a marine shop about this, they came back with part number 032020. This is a 9 inch diameter by 7 inch pitch. An online manual indicated the stock prop was 8 3/8" (Now obsolete) so not sure how a 9 x 7 compares to an 8 x 8. I'm sure there must be a formula for figuring this out, but I'm assuming one would need to know the gear ratios. I may just throw the 9 x 7 on and see were my RPMs are too. I can't imagine there would be a huge difference between and 8 3/8" to 9". Motor also has a 17 1/2 inch shaft, which I've never come across before. I thought there was just a standard short shaft ( 15 inches) and a long shaft ( 20 inches), and a few extra long for special applications. Thanks again! Troy [/QUOTE]
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stock prop for Mercury 9.8, 2 stroke motor
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