Loyd Dinneen
Active Member
- Jul 29, 2017
- 484
- Boat Info
- 1977 Sea ray 240 SDA cruiser w/ twin 470 mercs.
- Engines
- Twin 470 Mercruisers
I am curious where water can enter the outdrive oil when all I have done is run it with muffs, it hasn't been in the water yet. I have earlier replaced the carrier seals, Shift shaft seal,and the waterpump complete from bottom to top. The lower was pressure tested and passed with no pressure loss.
I have the whole drive off now and have separated the upper and lower and replaced the upper seals and it looked like the lower waterpump area had some exhaust intrusion. What I did notice is when I removed the outdrive the last person who had worked on it had not put on a new housing gasket(there was really not one there only sealer and parts of the gasket)and the water o-ring looked old and was flat and hard. Would like to figure this out before reinstalling the outdrive, I have put new bellows in and the large square o-ring(it was installed with silicone sealer before) and the u-joint bellows were full of old grease and the gimbel bearing was shot (replaced it). Basicly I have rebuilt the standard stuff and don't want to go back into it again for a long while, so please help me find out where this water came from. Another clue is the water wasn't mixed into the oil very much but ran out clear when I pulled the bottom plug about a 1/2 of a cup and the oil was missing almost the whole qt there was only about a pint left. I did notice that the bottom plug had a double gasket on it and at one time some oil was coming out of the prop exhaust area but the not the carrier seal(replaced). My merc mechanic said it was overflow from some area when we had filled it after doing the lower repair. Please any response would help me figure this out.
I have the whole drive off now and have separated the upper and lower and replaced the upper seals and it looked like the lower waterpump area had some exhaust intrusion. What I did notice is when I removed the outdrive the last person who had worked on it had not put on a new housing gasket(there was really not one there only sealer and parts of the gasket)and the water o-ring looked old and was flat and hard. Would like to figure this out before reinstalling the outdrive, I have put new bellows in and the large square o-ring(it was installed with silicone sealer before) and the u-joint bellows were full of old grease and the gimbel bearing was shot (replaced it). Basicly I have rebuilt the standard stuff and don't want to go back into it again for a long while, so please help me find out where this water came from. Another clue is the water wasn't mixed into the oil very much but ran out clear when I pulled the bottom plug about a 1/2 of a cup and the oil was missing almost the whole qt there was only about a pint left. I did notice that the bottom plug had a double gasket on it and at one time some oil was coming out of the prop exhaust area but the not the carrier seal(replaced). My merc mechanic said it was overflow from some area when we had filled it after doing the lower repair. Please any response would help me figure this out.