[C38] Engine blower

[Charles Finn]

Marc,

Several issues here.

1. Only gasoline engines MUST have a blower, but it is a very good idea 
for one on a diesel as it helps with any heavier than air gas that could 
accumulate in the bilge  (propane for example).  I personally would 
insist on having a blower regardless of engine type.

2. The blower exhaust hose/s should end up at or near the lowest point 
inside your boat.  Most C38s had them end just aft of the bilge pump and 
another in the engine compartment.  Truth on my boat is I have rolled 
over mine so many times while attending to my "engine room"  (aka 
Dante's 7th level of hell) that they are 1/2 the size they were 
originally, but they still do draft!

3. The exhaust blower is on the port side.  The air intake (essential 
for proper diesel engine performance) is on the starboard.  Diesels use 
a lot of air and must not become air starved.

4. If you want to ventilate your cabin, use something else than this 
system as the fumes you are smelling are many feet off the floor.  
Probably the best answer here is to install cowl ventilators with a 
dorade box.  These work all the time when the wind is blowing and really 
do improve the cabin air.  I also have a solar vent in the head that 
works ok.

5. I cannot recommend connecting the blower to the ignition. Install a 
rocker switch inside the aft locker where it is easily accessible and 
out of the weather.

Best,
Chuck Finn
Mighty Quinn #114
Great Lakes


On 2/22/2018 8:48 AM, Don Strong wrote:
> Marc: Discrete Charm is C38 #50, 1980; a real old timer. The engine 
> blower was frozen and crusted with salt and corrosion when I acquired 
> the boat.. My surveyor told me that it was for the original gas 
> engine, which had long ago gone to the scrap heap. I removed the 
> salt-crusted blower and also removed those tubes to make space. I 
> cannot say that my Yanmar diesel needs a blower venting of the engine 
> "room" (aka torture chamber when you have to go there). However, I'm 
> open to others' opinions on the matter.
> Regards, Don
>
> On 2/22/18 6:39 AM, Max Soto wrote:
>> Hi Marc, Estancia came with a blower switch on the engine panel, 
>> connected to the accessory side of the ignition switch.
>> I’m with Steve by not connecting it directly to ignition. I would 
>> install a esperaste switch somewhere else on the boat.
>>
>> Regards,
>>
>> Max Soto A.
>> +506-8312-1367
>>
>> On Feb 21, 2018, at 16:01, Steve Smolinske 
>> <SSmolinske at rainierrubber.com <mailto:SSmolinske at rainierrubber.com>> 
>> wrote:
>>
>>> Marc, the two vents one should have a hose that runs to the blower 
>>> then down into the engine compartment, the other vent is for intake 
>>> and doesn’t necessarily need a hose.  I would wire the switch 
>>> separate from the ignition so you could use it without turning on 
>>> the key.
>>>
>>> *From:*Listserve [mailto:listserve-bounces at catalina38.org] *On 
>>> Behalf Of *Marc-Andrea Klimaschewski
>>> *Sent:* Wednesday, February 21, 2018 1:43 PM
>>> *To:* listserve at catalina38.org <mailto:listserve at catalina38.org>
>>> *Subject:* [C38] Engine blower
>>>
>>> The engine blower on Image is not operational and the air hoses and 
>>> dangling around in the engine room.
>>>
>>> Any thoughts on how to rectify this? I would hope a blower would 
>>> reduce diesel smell down below while under power which would be 
>>> nice. Where do the hoses to the vents in the stern run? One from the 
>>> blower to the engine and one back? Or are there two blowers? I only 
>>> see one on Image on the port side.
>>>
>>> Also, for the wiring of the blower: I have a new engine panel (with 
>>> a volt meter instead of an ammeter as well as a solenoid for the 
>>> glow plugs). The new panel does not have a blower switch. Would it 
>>> be acceptable to wire it in with the ignition (which currently 
>>> starts the fuel pump)?
>>>
>>> Thanks
>>>
>>> Marc
>>>
>>> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for 
>>> Windows 10
>>>
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>>
>>
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>
>
> -- 
> Donald R. Strong
> Professor,
> Department of Evolution and Ecology
> and
> The Bodega Marine Laboratory,
> University of California, Davis,
> Davis CA
> 95616
> 530 752 7886
>
>
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