SpurHunter
Well-known member
I dont know why I didnt think of this untill now, but Bubbakat was nice enough to find this information on the motor years mine falls into. Some may remember I blew mine back in December. Figured it was too good of info not to pass on. </p>
Per Bubba:</p>
"I have been running your motors demise over and over in my mind and could not come up with a good reason why it would do this. Then it dawned on me that I read a bulletin on those motors some where so I serched through my files and came up with this."</p>
Engine: 1991 & up carbureted
150/175 HP 60 degree V-6 Evinrude
and Johnson outboards <b />(6V-6 Eagle<b />)
Description: Approximately 25% of
the 6V-6 blocks we test will show a leak
into the #1 cylinder from the center water
cavity underneath the regulator/rectifier. In
certain cases, a leaking engine may develop a
knock at around 3500 rpms. The sparkplug
may also show signs of water, and the cylinder
head’s combustion chamber, piston dome,
and/or exhaust port may show signs of being
steam cleaned by water. It is important to note
that some engines in the early stages of
leaking may not show the mentioned
symptoms and can <font color="#ff0000">only</font> be detected by
pressure testing the block. </p>
Cause: The leak develops from a thin section
in the block. Due to engine vibration,
varying pressures, expanding and
contracting, the aluminum cracks
over time and causes water to leak
from behind the sleeve.
</p>
Per Bubba:</p>
"I have been running your motors demise over and over in my mind and could not come up with a good reason why it would do this. Then it dawned on me that I read a bulletin on those motors some where so I serched through my files and came up with this."</p>
Engine: 1991 & up carbureted
150/175 HP 60 degree V-6 Evinrude
and Johnson outboards <b />(6V-6 Eagle<b />)
Description: Approximately 25% of
the 6V-6 blocks we test will show a leak
into the #1 cylinder from the center water
cavity underneath the regulator/rectifier. In
certain cases, a leaking engine may develop a
knock at around 3500 rpms. The sparkplug
may also show signs of water, and the cylinder
head’s combustion chamber, piston dome,
and/or exhaust port may show signs of being
steam cleaned by water. It is important to note
that some engines in the early stages of
leaking may not show the mentioned
symptoms and can <font color="#ff0000">only</font> be detected by
pressure testing the block. </p>
Cause: The leak develops from a thin section
in the block. Due to engine vibration,
varying pressures, expanding and
contracting, the aluminum cracks
over time and causes water to leak
from behind the sleeve.
</p>
