Home › Forum › Ask A Member › Length of driveshaft. 1958 Evinrude 10 horsepower.
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billy-j.
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September 28, 2024 at 10:20 am #291169
Hello. Would anybody know the exact lenght for the standard driveshaft for a 1958 Evinrude 10 HP. I have an engine with the leg extension to make the motor longer for a 20” transom. I want to convert it back to a 15” transom motor. Among my circle of friends they have some driveshafts but not having a part number to identify it I am at a loss. I have picked 3 up from them and they vary by a 1/4 to 1/2” diferent. It has original lower unit. Any help would be appreciated. Excuse some bad spelling here but when I go back to correct words it highlights everything blue and then erases my entire post that I wrote. Regards Bill,
September 28, 2024 at 11:13 am #291170If you have the powerhead off or would be willing to remove it I think you could tell which of your driveshafts would work. A good time to remove carbon deposits and have a look around for other issues.
September 28, 2024 at 11:31 am #291171Billy you have a hard project you are working on. The 58 OMC 10hp motors had a lower unit leg similar to the 5 1/2 and the 7 1/2hp on the outside but inside lots of parts were different. I would suggest you look for a complete 15″ leg. A couple years ago I built one of these motors and I found a lower unit/leg from this member. eddelliott@cox.net Send him a email maybe he can fix you up!
dale
September 28, 2024 at 2:18 pm #291172If you have the powerhead off or would be willing to remove it I think you could tell which of your driveshafts would work. A good time to remove carbon deposits and have a look around for other issues.
Hello. Yes that was what I was thinking. I am pieceing together a motor from parts. But everything has a part number on it so everything is correct. Exept drive shaft. Lower unit is original to the 1958 leg it just had an exstension added to make the motor for 20” transom. I will have to measure with the powerhead off the leg and see where the shaft sticks up and make sure the shorter 15” shaft sticks up the same. I am aware different year lower units while they may fit as a complete unit have different gear ratio’s and the drive shaft lenght may vary if you mix the parts from lower units that are pieced together. I could possibly jus measure the height of extension and knock off that amount. Thank You. Bill,
September 28, 2024 at 2:22 pm #291173Billy you have a hard project you are working on. The 58 OMC 10hp motors had a lower unit leg similar to the 5 1/2 and the 7 1/2hp on the outside but inside lots of parts were different. I would suggest you look for a complete 15″ leg. A couple years ago I built one of these motors and I found a lower unit/leg from this member. eddelliott@cox.net Send him a email maybe he can fix you up!
dale
Yes. some things take research to find the correct answer. Thank you also.
September 28, 2024 at 2:22 pm #291174Billy you have a hard project you are working on. The 58 OMC 10hp motors had a lower unit leg similar to the 5 1/2 and the 7 1/2hp on the outside but inside lots of parts were different. I would suggest you look for a complete 15″ leg. A couple years ago I built one of these motors and I found a lower unit/leg from this member. eddelliott@cox.net Send him a email maybe he can fix you up!
dale
Yes. some things take research to find the correct answer. Thank you also.
September 28, 2024 at 4:48 pm #291175’58 10 HP driveshaft length 25-1/2″
September 28, 2024 at 4:54 pm #291176My Johnson Common Parts List shows the part number for the shorter driveshaft as #305318 if that helps in your search.
Bob
1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1957 Evinrude Fastwin 18
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."September 28, 2024 at 5:48 pm #291177’58 10 HP driveshaft length 25-1/2″
Thank you. I also got that measurement from a listing on eBay. I also picked up 3 drive shafts from a friend and though identical the lengths varied like a 1/4 ”. I have another friend that has a 5 gallon bucket of shafts from motors he parted, so I will do a little measuring. The three shafts I got from my friend have some issues where the seal rides. I am going to get one with good surfaces as the motor I pieced together has everything in nice shape.
September 28, 2024 at 5:54 pm #291178My Johnson Common Parts List shows the part number for the shorter driveshaft as #305318 if that helps in your search.
Thanks for the part number. I also like your sayings at the bottom of your message about the broken bolt. I am proud to say I have achieved with age the humility and wisdom to walk away from a project than to hurry up and break that bolt. Regards Bill,
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