fritz3000g
New member
Hi there,
New member, new poster. Looks like a great forum!
I bought a used 1989 Yamaha 9.9 4 Stroke. After fixing some initial carb. problems, I noticed that oil and water are mixing in the engine. The oil tank is filling up, and I see oil leaking onto the driveway when I test it.
It holds pressure well (114 and 119 on the two cylinders) at last test. I know that oil and water can mix because of a cracked block, but a solid test seems like it would rule that out. True?
I also know that a cracked manifold could lead to oil-water mix, and might not affect my pressure reading.
Anyone know what the most likely culprit is, and maybe the second most likely?
Thanks!
New member, new poster. Looks like a great forum!
I bought a used 1989 Yamaha 9.9 4 Stroke. After fixing some initial carb. problems, I noticed that oil and water are mixing in the engine. The oil tank is filling up, and I see oil leaking onto the driveway when I test it.
It holds pressure well (114 and 119 on the two cylinders) at last test. I know that oil and water can mix because of a cracked block, but a solid test seems like it would rule that out. True?
I also know that a cracked manifold could lead to oil-water mix, and might not affect my pressure reading.
Anyone know what the most likely culprit is, and maybe the second most likely?
Thanks!