kfa4303
Banned
- Joined
- Sep 17, 2010
- Messages
- 6,094
Re: 1955 15 hp Fastwin throttle issue
Hello again das. Actually, I think you may be running it a bit lean. 24:1 doesn't sound right for a '55. It should be 16:1 and certainly not 50:1. These old motors were completely dependent on the oil in the fuel for lubricating their internal components, if you skimp on the oil, you're asking for trouble and an over heat. You friend is wrong, wrong, wrong about the new oils. While they are cleaner/better/synthetic, you still need to use the factory recommended amount. To borrow a phrase I found here in the forums, oil in is to these old motors as water is to an athlete. Generally speaking more is better and you certaily don't want to be stingy with it. You may also want to decarb your motor to help smooth out the idle too. Do a search here in the forums for "decarb" and/or "Sea foam" and you'll find instructions. It's a super simple, quick, cheap job that can make a world of difference to an old motor. Most folks would agree that a can of sea foam, used properly, is about the best $10 you can spend on an old motor. After the decarb try resetting the lo/hi speed needles in the carb using this link. Keep us posted. You';re almost there. The rest is just fine tuning and tweaking.
http://forums.iboats.com/showthread.php?t=167352
Hello again das. Actually, I think you may be running it a bit lean. 24:1 doesn't sound right for a '55. It should be 16:1 and certainly not 50:1. These old motors were completely dependent on the oil in the fuel for lubricating their internal components, if you skimp on the oil, you're asking for trouble and an over heat. You friend is wrong, wrong, wrong about the new oils. While they are cleaner/better/synthetic, you still need to use the factory recommended amount. To borrow a phrase I found here in the forums, oil in is to these old motors as water is to an athlete. Generally speaking more is better and you certaily don't want to be stingy with it. You may also want to decarb your motor to help smooth out the idle too. Do a search here in the forums for "decarb" and/or "Sea foam" and you'll find instructions. It's a super simple, quick, cheap job that can make a world of difference to an old motor. Most folks would agree that a can of sea foam, used properly, is about the best $10 you can spend on an old motor. After the decarb try resetting the lo/hi speed needles in the carb using this link. Keep us posted. You';re almost there. The rest is just fine tuning and tweaking.
http://forums.iboats.com/showthread.php?t=167352