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Post by rhb on Apr 28, 2010 12:10:52 GMT
I visited an SO39I recently and noticed a large (maybe 100mm) flex tube with a fan on the end in the engine compartment. The fan started up whenever the ignition switch was on.
I'm guessing that this is an exhaust fan to remove fumes from the engine compartment. Is that correct?
There hasn't ever been such a fan on other boats I've owned.
Is this a CE requirement?
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Deleted
Deleted Member
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Post by Deleted on Apr 28, 2010 14:45:26 GMT
I don't know the exact reason it exists in the 39i, but SO 35's have this. The fan is controlled by a thermostat that activates once the temperature in the engine compartment rises above a preset level. It's purpose is strictly cooling from what I can tell.
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Post by MalcolmP on Apr 29, 2010 8:03:03 GMT
On our 39i, it is always on (when the engine is on) and the dealer confirmed that there is no thermostat
It is quite noisy and the original one shot its bearings last year- but was cheap to replace (around £25 from memory)
On the upside it does keep the boat cooler on hot days, our 34.2 did not have a fan and if the engine was on for a long time the engine compartment would build up temperature a lot more
I think it is there for 2 reasons. 1 to ensure the engine gets plenty fresh air without drawing from the bilge and 2 to ensure vapours are kept to a low level
I might think about putting in a thermostat, but have got used to the additional noise (and I think I am going slightly deaf...)
Malcolm
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Post by sitara on Apr 29, 2010 8:09:11 GMT
My SO 29.2 engine compartment is fitted with two 100 mm ducts exiting the transom presumably for ventilation. The rear cabin was often quite stuffy after the engine had been running so I fitted a bilge blower into one of the ducts (Rule) and connected it to a spare switch on the switchboard. The blower is a bit noisy but it has solved the problem.
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