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Oct
To drain from the top plate of the gearcase. 2 strokes are inefficient at low rpms and allow up to 40.
I decided to do some much needed maintenance and start with chanigin the lower unit oil on my twin 2004 200hp HPDIs.
Lower unit leaking oil out water intake. Oil leaking from water intake if it is lower unit oil then yes a reseal is in order. It may just be unburnt fuel and oil dripping out of the exhaust. Check the lower unit oil and see if it has any water in it.
Lower unit oil overflowed out of water intake vent. Gear oil is always filled from the bottom hole till it comes out the top hole————So run to your favourite repair shop and ask for a pressure test on the lower unit——-If this is OK then fill the lower unit with oil. 03-23-2014 1255 PM 3.
You most likely have a bad seal in the lower unit. The lower unit is fairly easy to remove if you are a do it yourselfer change the water pump while you have it apart. If you dont want to change it yourself you could remove the lower unit and take it to a shop.
Go on utube and you will see the removal process. Dec 15 2017 3 cwag911 Moderator. Honda buys them from Mercury so if necessary any Mercury dealer can easily service those lower units.
Since youve got gear oil leaking out of the WATER intakes youve got a problem that needs immediate attention. Consider it somewhat akin to blood running out of your mouth your waterbeer intake Your engine needs to see a doctor. Oil Leak From Water Intake Kris the only way I have ever seen oil coming out of the intake ports is from a seal leak along the drive shaft that drives the impeller and lower unitor the oiling passage from the gearcaselower part of the outdrive to the top gearcase on the upper part of the outdrive.
Defiant one Sure drop the lower unit. Drop the lower unit off at the dealer and have him go through the lower unit to check bearings gears and to replace all seals in the lower unit. Also replace the water pump and the water pump seals in the lower unit as well.
Shift Shaft SealBushing 90 HP EFI MercuryWater leaking into Lower Unit Gear Case of 2010 90hp EFI MercuryIf your going to replace your impeller so easy to. Hello- leaking gear oil out the water intake holes means the seal between the pump and the lower end has failed. You can see your lower end unity drawing here.
The failed seal is most likely part 9 or more likely 10. The seals on the lower unit are one way seals and are designed to keep water out of the lower unit not necessarily to keep oil from coming out the other way. So assuming that you depressurized the lower unit let the lower unit drain and refill it properly with no further sign of oil out the water intake you should just plug up the lower unit after the oil is at the correct level.
The only places it can leak besides the fill and drain plug is behind the prop and around the drive shaft and shift shaft which you cant see. You would have to drop the lower gearcase to see those seals. The most common leaking place is behind the prop and it generally happens when youre going along.
So assuming that you depressurized the lower unit let the lower unit drain and refill it properly with no further sign of oil out the water intake you should just plug up the lower unit after the oil is at the correct level. Then when you go to use the motor in the warmer time of the year keep a very close eye on the lower unit. Noticed today in the driveway the motor was leaking a small amount of oil onto the driveway.
The leak was dripping out of the water intake see photo. Researching it sounds like it could be the driveshaft seal or possibly just used oil making its way out the motor. All the seals except for the input shaft seal are just pull outdrive in seals.
If it is the upper leaking you just need an upper unit seal kit. Check the oil to see if its low. Drain some and look for signs of water white runners in the oil or milkshake.
That hole is there to drain the water from around the drive after you pull out. Was heading out to work and noticed that there was a decent amount of oil or gear lube that has leaked from my lower unit in the driveway. Last nigh got down to 28 just enough for the water to freeze in the dogs water bowl.
At first I thought that the lower unit had cracked. But upon further inspection I noticed that there are two pre drilled holes that the fluid is coming from. Lower unit Mercruiser Out drive is leaking gear oil out the water intake after replacing the water pump impeller Lower unit Mercruiser Out drive is leaking gear oil out the Working on lower unit of a Mercruiser MC-1 pre-Alpha Working on lower unit of a Mercruiser MC-1 pre-Alpha outdrive.
Actually 2 of them. Replaced impeller on one. Ok so I pulled the lower unit and water pump and everything looked ok.
So i pulled the intake screens and the little allen head screw under the screen is leaking. It was loose and the allen head portion of the bolt is almost completely stripped out. Sitting increases the chance of water in the drive but still fairly remote since the internal cavity is so full.
If you find that an external leak never lets any water inside and it is very slow then adding oil sometimes could bea cheaper and easier than a repair. Knowing exactly the right thing to do in a bad situation. The oil dripping from the lower unit where the exhaust comes out is a new issue.
Its definitely oil from the fueloil mix not oil from the lower unit gear case. The oil is black and has an exhaust smell to it. The oil in the gear case is almost as clean looking as it was the day it was put in.
Engine seems to be running fine. Looks very closely and try to figure out where the oil is coming from. I have a small Honda that the lower unit leaks.
As the water freezes it pushes the lower unit oil up through a shift linkage seal. From there the oil runs out a weep hole runs down the skeg and drips. Like mentioned above lower unit oil and engine oil small very different to.
Water in lower unit. Ok well I just got back to the states after my quick deployment to the middle east. I decided to do some much needed maintenance and start with chanigin the lower unit oil on my twin 2004 200hp HPDIs.
No issues with the stbd motor besides some hair on the mag plug but it was just a little bit. The intake is the screen on the skeg aft of the prop. The hole with the oil leak is the weep hole that allows water.
To drain from the top plate of the gearcase. Unburnt oil will settle there off the inside of the exhaust housing. Then leak out for several days.
2 strokes are inefficient at low rpms and allow up to 40. So I went out to check on the boat today and noticed that the outdrive bravo 1 has a small puddle of oil under it. The boat has been stored for around 2 months and I didnt notice any puddles when I picked it up or used it last.
It appears to be dripping of the bottom fin but not sure where its originating from. IF it really is gear oil it can only leak via the prop shaft seals which it clearly isnt the drive shaft seals below the water pump the shift rod seal boot or the gasket on the top of the gearcase not sure about this last one though. The lower-unit pressure tester looks something like a bicycle air pump with a pressure gauge and a hose with an adaptor to allow it to.