If you got fumes concentrated enough to explode up as far as the distributor
then you got a lot of gas in the bilge. The starter and low mounted
alternators are the critical items. And the likelyhood that the coasties
are going to figure out it had an automotive cap are about nill. All the
plastic will be melted anyway. Coasties probably won't even look at it if
it catches fire unless it's convenient.

"Calif Bill" wrote in message
...

"Jeff Burke" wrote in message
...
On Tue, 28 Aug 2007 22:53:30 -0700, "Calif Bill"

wrote:

If it does not have the little door to externally adjust the points it is
OK. It will be a closed cap.

Some Chrysler caps had a vent hole, not all.
Aren't boats with inboard engines supposed to have exhaust blowers to
keep the
engine compartment clear of fumes? Don't these vent well enough so that a
spark
isn't a problem? I ask because I don't know.

Engine compartment blowers should clear the fumes, but if someone neglects
to run it long enough, the spark can exit the hole in the cap. Insurance
may be void.