Adefelice
Member
- Jul 18, 2012
- 79
- Boat Info
- 01 Wellcraft 3700 Martinique, Mercury RIB with 8hp Yamaha 2 stroke.
- Engines
- Twin 454 7.4 MPI Horizon
We were heading back from Block Island for our 3hr trip back home and one of the tranny's slipped 10mins from our marina. You could feel it slip and the RPM's ran up to 5K. Also noticed a trail of oil behind the boat coming out of the exhaust.
Immediately jumped into the compartment and checked fluid. It was the consistency and color of a McDonald's strawberry milkshake.
We shut that engine down and came in on one.
Once we were at the dock I pumped out all the water and rest of the milkshake.
I filled the gear case to the top with ATF and let it sit. Pumped that out, removed the oil cooler and replaced it with the port engine cooler. Each time the color and consistency were getting better.
Filled it back up with ATF and let it idle in my slip for 5 mins.
Pumped that ATF out and did it one more time.
I do have forward and revs at the dock, not sure if it will slip again at 2500 - 3000rpm.
Right now I am waiting for 2 coolers to arrive along with new hose.
In the meantime, I'll pump and dump the transmission fluid until I see normal consistency and color.
Some folks at the dock recommend kerosene (I don't feel comfortable with that) or maybe Marvel Mystery oil to help clean it out?
I know I'll get some of the best advice here and wondering if the trans is done or if I have a chance at saving it?
Also, when removing the old cooler I found pieces of an old impeller partially blocking the raw water inlet on the cooler. I'm wondering how this could be since the fuel cooler would be the first in line from the raw water pump, then the trans cooler.
454 7.4 Horizon motor with ZF 63 IV trans
Immediately jumped into the compartment and checked fluid. It was the consistency and color of a McDonald's strawberry milkshake.
We shut that engine down and came in on one.
Once we were at the dock I pumped out all the water and rest of the milkshake.
I filled the gear case to the top with ATF and let it sit. Pumped that out, removed the oil cooler and replaced it with the port engine cooler. Each time the color and consistency were getting better.
Filled it back up with ATF and let it idle in my slip for 5 mins.
Pumped that ATF out and did it one more time.
I do have forward and revs at the dock, not sure if it will slip again at 2500 - 3000rpm.
Right now I am waiting for 2 coolers to arrive along with new hose.
In the meantime, I'll pump and dump the transmission fluid until I see normal consistency and color.
Some folks at the dock recommend kerosene (I don't feel comfortable with that) or maybe Marvel Mystery oil to help clean it out?
I know I'll get some of the best advice here and wondering if the trans is done or if I have a chance at saving it?
Also, when removing the old cooler I found pieces of an old impeller partially blocking the raw water inlet on the cooler. I'm wondering how this could be since the fuel cooler would be the first in line from the raw water pump, then the trans cooler.
454 7.4 Horizon motor with ZF 63 IV trans