30
May
Is it OK to start a boat out of water. The lower unit is sealed under the water pump and the bearing carrier.
I will tell you what y.
Water in lower unit of outboard motor. What causes water to get in lower unit. Since the motor is only 3 years old and assumming you have run it moderately or less and you have changed the oil previously it may well be as the last post reply - vent andor fill plug. Last year when I changed my lower unit oil I inadvertantly forgot a teflon washer on one of the plugs.
Port motor on the other hand not so good I pull the plug and it seems as though the plug is defferent bigger than the stbd motor and I get milk out of the lower unit. This is my first time doing the lower unit oil on these motors as Ive only had it for a short period of time. I bought all new upper and lower plugs and gaskets but that port drain plug is much different.
My question is what. In the case of your outboard the metals are most of the parts in the powerhead and gearcase and the electrolyte is the water. Galvanic corrosion happens much faster in salt water a stronger electrolyte but also occurs in fresh water.
Anodes or zincs protect outboards from galvanic corrosion. With three distinct sections of the outboard motor its essential to determine when something has gone wrong with the lower unit or one of the other areas. Bad outboard lower units can give the operator shifting issues and other signs will include water in the gear lube metallic particles on the drain screw magnet clunking sounds when shifted or the loss of the ability to shift into gears.
This how-to video shows the procedure for removing the lower unit on an antique 1968 39hp Mercury outboard motor including steps for water pump disassembly. Milky lower unit oil means you have water in the oil which means youve lost a seal somewhere. The first place to look is the output seals which are found behind the propeller.
Theyre commonly damaged when fishing line gets wrapped around the prop shaft and the seal can be inspected by removing the prop. Water coming out between lower unit and midsection Sounds like you have it assembled properly. That occurrance of having water leak out that metal to metal area is normal and it will eventually seal up with salt etc.
After running in test tank for 5minutes I noticed the water discharge was far less. Also noticed substantial amount of water coming from between mid and lower unit. The weep holes for lack of better term in the front of the lower unit had pressurized streams of water coming from them I dont remember this being the way it was before.
The lower unit is sealed under the water pump and the bearing carrier. As long as water is not getting into the gearcase and the engine cools it is fine. In the water you would not notice it.
You are probably looking at a engine running on the hose. Dis-assembly and reassembly of a lower unit on a Mercury outboard. This video shows how to take apart the gearcase of an outboard motor and shows how it wor.
Lower unit leakage or water in the outboard motors lower unit can occur because of excess corrosion on the lower unit components or if one or more parts terminals of the lower unit are broken or damaged. This video will show you a step by step instructional video on changing you outboard motor lower unit oil. This is a cheap way to keep up with engine mainten.
Beside this where does water come out of outboard. The water comes into the outboards engine through the lower unit which is below water level as the boat is moving. Without a pump of some kind water couldnt flow up to the engine.
Is it OK to start a boat out of water. Flushing a boat motor by running it out of water is a routine maintenance task. Dealing with lower unit issues on your outboard.
The water pump pushes water up through the engine to keep it cool. The water pump assembly is attached to the drive shaft and uses the rotation of the driveshaft to power the water pump. As the driveshaft rotates it.
In this video I will show you step by step how to How to remove the lower unit on a outboard engineWATCH this Subscribeits free. I will tell you what y. Place the outboard on a motor stand out of the water to allow access and a stable platform with which to work.
Remove the four attachment bolts from the lower housing by turning them counterclockwise with a wrench. Also know Can you run an outboard motor without the lower unit. Yes you can run it without lower on with water hooked up to it done it before.
Dont turn water on all the wayremember the size. Failure to remove this debris can cause or contribute to corrosion in the engine. If youre a saltwater boater salt crystals in the lower unit can cause a great deal of damage.
If your outboard has a hose adapter simply screw the hose into the port turn on the water and let the water run for about 5.