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14 answers

Sounds like the motor has taken a fair wack on something. If its below the cavitation plate it has probably distorted the gear housing itself which means the gear assembly will most probably not sit right and will eventually fail. Welding is an option and so is something like JB Weld. My advice is get hold of a replacement housing and re-build it!

2006-12-14 22:57:07 · answer #1 · answered by Mike D 3 · 2 0

Boat Lower Unit

2016-11-12 07:51:24 · answer #2 · answered by kroell 4 · 0 0

Depends on how big the crack is, if the metal around the crack has become a hole or if the crack has split into more than one crack i would replace the lower unit, if it's a single crack that hasn't become a hole find someone who knows how to use a TIG welder get them to weld the crack

If the motor is under 20hp it's probably just easier to get a new motor

2006-12-14 17:35:41 · answer #3 · answered by Clayton B 3 · 0 0

As a certified marine mechanic, your best option is to have it welded. Otherwise get a new lower unit. You don't want to have water go in your lower unit, have it fail and ruin all of the gears and such, or worse yet cause a catastrophic failure that could really ruin your day. In the latter instance you might be looking at replacing a lot more than the gear housing and could potentially ending up injuring yourself, others, or dead (if you have an especially large horsepower motor).

2006-12-14 17:27:55 · answer #4 · answered by tdbizmail1 1 · 1 0

Sounds like the part of the motor that hangs in the water, (propellor, gear box, etc.) is not working. This could be an expensive repair. It may indicate the boat went hard aground or hit a submerged obstruction. If you are still interested, make sure it did not also damage the hull bottom especially where the hull and transom join. If damage is not obvious, have it inspected by a professinal marine surveyor and mention your concern. Best to have it surveyed anyway.

2016-05-24 18:31:07 · answer #5 · answered by Anonymous · 0 0

Lower Unit Repair

2017-01-03 14:10:38 · answer #6 · answered by Anonymous · 0 0

it depends. If it's a cast part, those can't be repaired very easally. A replacement part is your best option. However, if it's a sheet metal part, which it probalby is, and probalby aluminum or steel alloy, that can be welded, and the weld will be stronger the the original part. Aluminum is tricky to weld, so get somebody experienced. (you burn a hole right through if you're not careful) If it's steel, you might be able to do it yourself. If you do try that, make sure that the part is removed, and that there is no gas or other combustible still on the part. Always clean the part before welding it if it might have flammable chemicals on it.

That said, if you've never welded anything before, don't try it yourself. In order to get the strength you want, you don't want any bubbles in the weld, or gaps. those can ruin your part. Find somebody experienced to do it for you.

2006-12-14 17:31:17 · answer #7 · answered by The Big Box 6 · 0 0

Do not try to seal this with any type of so called super putty's. It wont work. This type of damage must be fixed with a weld or a braise. Depending on your knowledge of lower units and your ability to disassemble/assemble , you can do this yourself with a product called ...HTS-2000 fluxless brazing rod, all that's needed is mapp gas and the rod kit. If its the skeg that's cracked no big deal at all , if its the gear case ,then oil and gear assemble must be pulled out before repairing . This product is 80 dollars a pound and you can get it on the web site, New Technology products, this stuff is fantastic I've used it to repair stress cracks in aluminum hulls, skegs,transoms, motorcycle blocks I love it. It'll also come with a detailed cd showing you how to use it . good luck

2006-12-18 14:10:00 · answer #8 · answered by Stuka 4 · 1 0

Either way is good but a sealant like Liquid metal can be done cheaply and at home without a welder. This stuff can be found in most hardware stores. It comes in a tube you just spread it over the crack and let it set for a day and your good to go. If the crack is spreading however get it welded or replaced.

2006-12-15 05:00:25 · answer #9 · answered by brian L 6 · 0 0

it all depend what area of the lower unit is crack .. if the crank is on the unit it is better to replace the lower unit because are leaking oil in the waterways you are going to be boating in.

2006-12-18 12:56:44 · answer #10 · answered by baywarrior 1 · 0 0

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