This is a:
MERCURY - ( 40 H.P. (1992 ))
Serial No: 0D129270 Model No: 1040411MD Catalog No: 814698
That is right out of the Brunswick web app.
Here's the Problem the lower unit is taking in water, It is taking on water on the muffs as well as taking in water while in a thrust tank. Regardless it is taking water into the lower unit, and after it runs for a few minutes the gear oil comes running back out of the water intake slots. So naturally we jumped on replacing the drive shaft seals and thought while we where at it we would eliminate the prop shaft seals as well. So for the driveshaft seals we just ordered in a new water pump base and housing since the base comes with the seals in it. All new gaskets, there is no play in the driveshaft so it eliminates that as source of weakening the seals, I think it is unlikely that the old base and the new both have bad seals. I pulled the water intake vents to inspect for a visual crack in the unit and could see nothing. While the lower unit was off I pressure tested the lower unit I even went up to 16 psi and risked blowing the seals out there was no leaks bubbling in the soap water, then did the vacuum test and was unable to see any leaks at the seals no water drew in. Yet within like 3 minutes of run time the lower unit oil mixed well with water, do I have a crack in the lower unit I cant see, thanks any help would be appreciated. FYI I have been doing this 5 years and I have a 20year+ mercury mechanic with 47 certs and a 20+ year Johnson mechanic that both work for me, n we have no clue. has to be cracked right??? oh yeah and we did all of this twice and it still fails to seal...
Thanks for your time.
MERCURY - ( 40 H.P. (1992 ))
Serial No: 0D129270 Model No: 1040411MD Catalog No: 814698
That is right out of the Brunswick web app.
Here's the Problem the lower unit is taking in water, It is taking on water on the muffs as well as taking in water while in a thrust tank. Regardless it is taking water into the lower unit, and after it runs for a few minutes the gear oil comes running back out of the water intake slots. So naturally we jumped on replacing the drive shaft seals and thought while we where at it we would eliminate the prop shaft seals as well. So for the driveshaft seals we just ordered in a new water pump base and housing since the base comes with the seals in it. All new gaskets, there is no play in the driveshaft so it eliminates that as source of weakening the seals, I think it is unlikely that the old base and the new both have bad seals. I pulled the water intake vents to inspect for a visual crack in the unit and could see nothing. While the lower unit was off I pressure tested the lower unit I even went up to 16 psi and risked blowing the seals out there was no leaks bubbling in the soap water, then did the vacuum test and was unable to see any leaks at the seals no water drew in. Yet within like 3 minutes of run time the lower unit oil mixed well with water, do I have a crack in the lower unit I cant see, thanks any help would be appreciated. FYI I have been doing this 5 years and I have a 20year+ mercury mechanic with 47 certs and a 20+ year Johnson mechanic that both work for me, n we have no clue. has to be cracked right??? oh yeah and we did all of this twice and it still fails to seal...
Thanks for your time.