Hi all,
I have a regal 2760 with 2 mercruiser 4.3 V6 efi engines with balance shaft and vortex heads. driving through alpha 1 gen 2 drives.
I had a problem that caused water to enter my cylinders. I changed out exhaust manifolds it made one trip and then eventually ended up with water in the oil. I removed and pressure checked heads and intake and reconditioned and reinstalled both. engine seemed to work well with no water in the wrong place. on the trailer running on muffs.
just to save some cost since there would have been some water in the crank case, or so i thought, I decided to use some cheap 50weight oil. to initally flush through the engine. (50 body is the common cheap oil here as its very hot all year round. ) also since i did not really find a fault, if problem still existed.
when it was time for the test run, we forgot the oil change pump home so we decided to make the one run with the cheap oil.
boat ran well for about 25mins then it seemed to be holding back, loosing power, as i noticed this i pulled back to check, overheat alarm came on and i switched off. belt had come off. went back to marina on one engine replaced belt however engine seemed to have a knocking sound that i dont remember hearing before. starting it a few days later it seems to have developed a squeak sort of like a bearing intermittently sticking then rolling.
it sounds like the back part of the engine, nearer the port side. I was thinking gimbal bearing, however sounding with a screwdriver as the stethoscope, there is no sign of it from the outside. and there seems to be a sound that could be a bearing that has some wear but definitely not the squeak. I am thinking this sound is the gimbal bearing.
I was wondering if the 50body oil could have caused a total oil starvation in some area, or if anyone had any idea of what i could check before i remove the out drive. or other things that may cause this.
my plan is to change the oil let it run for a while if nothing changes remove the outdrive to isolate.
if outdrive good remove and throw away engine. i have had enough with it.
No Fuss
I have a regal 2760 with 2 mercruiser 4.3 V6 efi engines with balance shaft and vortex heads. driving through alpha 1 gen 2 drives.
I had a problem that caused water to enter my cylinders. I changed out exhaust manifolds it made one trip and then eventually ended up with water in the oil. I removed and pressure checked heads and intake and reconditioned and reinstalled both. engine seemed to work well with no water in the wrong place. on the trailer running on muffs.
just to save some cost since there would have been some water in the crank case, or so i thought, I decided to use some cheap 50weight oil. to initally flush through the engine. (50 body is the common cheap oil here as its very hot all year round. ) also since i did not really find a fault, if problem still existed.
when it was time for the test run, we forgot the oil change pump home so we decided to make the one run with the cheap oil.
boat ran well for about 25mins then it seemed to be holding back, loosing power, as i noticed this i pulled back to check, overheat alarm came on and i switched off. belt had come off. went back to marina on one engine replaced belt however engine seemed to have a knocking sound that i dont remember hearing before. starting it a few days later it seems to have developed a squeak sort of like a bearing intermittently sticking then rolling.
it sounds like the back part of the engine, nearer the port side. I was thinking gimbal bearing, however sounding with a screwdriver as the stethoscope, there is no sign of it from the outside. and there seems to be a sound that could be a bearing that has some wear but definitely not the squeak. I am thinking this sound is the gimbal bearing.
I was wondering if the 50body oil could have caused a total oil starvation in some area, or if anyone had any idea of what i could check before i remove the out drive. or other things that may cause this.
my plan is to change the oil let it run for a while if nothing changes remove the outdrive to isolate.
if outdrive good remove and throw away engine. i have had enough with it.
No Fuss
