|
|
I have a nearly new Yamaha F200 four stroke outboard on my commercial fishing plateboat. A couple days ago I was running the river checking nets when I hit a floating log about six inches in diameter. I was running about thirty-forty miles per hour. I did a visual at the ramp and did not see any damage. Today I hit another log about the same size or slightly larger going about the same speed. Upon inspection at the ramp I found what I believe to be hairline cracks. Maybe maybe not. Not sure. They start at the leading edge of the lower unit and run back towards the prop right across the bullet shaped gear housing. Not that this means anything but both licks did not kill the motor. I think they both broke in half upon feeling the thump and looking back.If I find they are cracks what would be suggested as the best procedure to weld this up? I have read that when welding on the lower unit to keep the lower unit oil in. Is this correct? Any help would be appreciated. Thanks. NetmanLincoln Power Mig 300 with PythonLincoln SquareWave Tig 255 Hypertherm Powermax 45 HH120 w/argon
Reply:Prop-doctor hasn't been on for a few months, but he's posted up lower unit repairs in the past from what I recall. You might try taking a look at some of his older posts and see if one might help or shooting him a PM. Hopefully he'll see it and reply..No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan
Reply:Depends on how bad the cracks are the oil acts kinda like a coolant so you don't burn the seal but if the crack are deep and many you might want to consider taking the leg apart and give it a good cleaning the weld can suck the oil up from the back side and you will never get a weld I'd pull the leg apart myself and spend the time to clean everything take a saw to the crack open them up and start welding. If your hittin a lot of logs maybe you should consider finding a jet leg for your motor and swapping it out when your running the rivers takes probally 30min to swap legs could be worth it if you can find a pump for cheap
Reply:Thanks for the replys. After I posted I did a google search and it picked up several post from here and other boating sites. Thanks again for your replys and suggestions.Lincoln Power Mig 300 with PythonLincoln SquareWave Tig 255 Hypertherm Powermax 45 HH120 w/argon
Reply:The important question is why would you not pull the lower unit? It is not difficult to do and usually part of the routine maintenance (annual) for most outboards as that is where the sea water pump is housed. Don't say that time is an issue you have already spent as much time here asking a question as it takes to drop a lower unit.
Reply:Netman, I'd say to weld the gear case it was imperative to remove, clean as well as possible, even going to hot tank if available, and then gouge the crack line and- TIG only welding. If the rear case threads are involved in the crack the weld-save is unlikely in my experience; I'd say if the crack can be seen in the thread ring then buy a new lower unit gear case casting. Recovering the threads from a full penetration weld requires some machining that would be more costly than a new case.Cheers,Kevin MorinKenai, AK
Reply:Kev I talked with Jay for over anHour the other day and you guys have a Lot in common with the marine industryHe is a smart cookie for sure Miller Dynasty 350Twenty Six HammersThree Crow BarsBig Rock |
|
发表于 2021-8-31 22:32:55