Running engine with blowers off (and warning lights)

[Heckler]

That makes me wonder if the blower is adding much, because a 3 inch blower might move that much air if it has no restrictions on outlet or inlet but in my boat the blower is in a long pipe that comes from an inlet at the back of the cockpit and that must severely reduce the amount of air it actually moves. There are two such inlet pipes, one each side and only the port one has a blower in it. As an aside the only outlet is actually the engine exhaust if the engine is running, or the starboard pipe if the engine is off and the blower running, a condition that does not occur as the blower only runs with the engine key in the run position.

Similar awb as mine, bit bigger. I have three vents on the sugar scoop, air out from the blower on stb. Two on port, one with pipe to the bottom of the engine compt and one to the sugar scoop. So air sucked by the engine and fan out comes to the bottom of the engine with any more needed coming from the sugar scoop area through the bottom of the aft bulkhead. So really it does make sense given the explanation by someone else above.

 

[Heckler]

I think it was fitted when the boat was built, and Jeanneau presumably fitted it the way they wanted it. In fact I am not sure it even runs and will check when I go to the boat in May. Whatever it does or does not do the engine compartment seems to be OK despite the high outside temperatures in Turkey.

Just in case Jenneau use exactly the same wiring system as my two Benes, When I first had them neither fans worked, I found the blown fuses inside the steering console amongst the rats nest of wires!

 

[Norman_E]

Jeanneau's wiring was all very neat with little numbered tags on wires to identify them (if only I had a list) and I have found no fuses in the original wiring which is all powered from panels fitted with circuit breakers. Before Beneteau bought them and used the brand for a cheaper range of boats (a policy they now seem to have reversed) Jeanneau yachts were pretty well made.

 

[knuterikt]

Running the engine with alarms and instruments turned off is a bad idea.
A friend of mine let someone use his boat last summer, the ignition was turned off after engine was started.
After a while an oil hose broke and all engine oil ended up in the bilge, without any alarm...
New engine being installed now...
I suggest you install a separate switch for the blower. Measure the engine room temperature while running to see if the temperature is within specs.

 

[pagoda]

Jeanneau's wiring was all very neat with little numbered tags on wires to identify them (if only I had a list) and I have found no fuses in the original wiring which is all powered from panels fitted with circuit breakers. Before Beneteau bought them and used the brand for a cheaper range of boats (a policy they now seem to have reversed) Jeanneau yachts were pretty well made.

If you don't have the right parts of the user manual for your boat's electrics - you might well find then buried in http://www.jeanneau-owners.com pages? The electrical and plumbing diagrams are towards the back. Not the easiest to decipher, being systematic in only a way the French can do!

 

[Norman_E]

If you don't have the right parts of the user manual for your boat's electrics - you might well find then buried in http://www.jeanneau-owners.com pages? The electrical and plumbing diagrams are towards the back. Not the easiest to decipher, being systematic in only a way the French can do!

I have the diagrams, which are pretty hard to understand. They are on the boat, and when I go I will look to see if the blower is shown.