It is recommended to use a new Replacement Alpha 1 water pumps each year because if the pump is not working, then the engine damage may take place because of the overheating. When the engine has been overheated already, you have to be aware of some few things. A hot exhaust caused by the overheated engine, it may melt lower and upper housings. It can also ruin seals of the outdrive. Many times, the customers will replace the water pumps when the overheat has already ruined the outdrives. When you know that the drive may have become too hot, you should get it resealed from authorized dealer.
Working on the drive is something that can be messy and difficult. Outdrive is too heavy and if you are not in the right shape, it is better to get a mechanic to work on it. The right way that you can replace the pump is removing an entire drive and to have something to support it in the stand.
When replacing the pump, you should think about things like shaft positions, sealers and o-rings. When the drive is found apart, you should inspect everything from the bottom to the top with inside. When you miss even one item, then the engine and drive may fail. You should be extra careful.
You should place a gear shifter in the forward gear. The shifter has to be on the forward in order to remove a drive. You can lift a drive using your hands and to let it to drop so that it can get loose. It can be stuck and it is better to be careful so that the drive can be off. You can support a drive using lower or the upright position within the stand. You can remove drain and vent plugs in order to let the oil in the drive to dry.
You can then unbolt an upper part of lower Mercruiser water pump kit. The most important is noting that the bolt was hidden in the up or under a zinc trim tab. You can remove the zinc trim tab first and you can use allan ahead of the screw found underneath.
The two side nuts found with the Alpha one should be the last one to get removed and they are not going to come off completely if the housing has not been separated.
You should then lift upper housing off so that it can get off your way. You can notice some oil leaking. This is ok.
The pump has the plastic upper housing with Gen 2 drives which are in stainless housing. You should then remove an impeller, wear plate and the key. When you have finished removing everything, then the bottom round section can stay within its housing since it is still screwed up. When you did everything right, there will be no plastic within the housing.
After removing everything, then it is time to look for different things. You should look down in water intake passage and to ensure that it looks clean. You should then inspect the copper tube and the wear on the seat.