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Hot Item
Hot exhaust risers can
indicate a serious problem.
While the engine exhaust riser temperature can vary
between manufacturers and old versus new risers, the temperature
should not exceed a temperature that is warm to the touch. If you can not hold
your hand on the riser, it is too hot.
In the absence of a portable thermometer, the
surveyor should be able to touch the riser without pain or injury. Even if the
the engine temperature gauge indicates a normal temperature
the riser may be poor condition.
If the risers cooling water passages are
constricted, note photo below, sufficient water will not pass through to
properly cool the remainder of the exhaust system. In many systems the
next link is rubber which will burn. Once the rubber portion burns two things
are likely to occur, 1. Sea water will enter the hull,
2. An engine compartment fire will ensue.
The riser pictured below has been in use in salt
water,
summers only, for four seasons. |
