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Old 01-08-2017, 04:57 AM   #1
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Default 2400 SCR Engine Vents


On the 1995 2400 SCR the engine bay vent is on the stern of the boat, do I have to run the blower all of the time or will there be enough air flow through the engine bay without running the blower while cruising?????
All of the other boats I have owned and been on had the vents on the side of the hull!
I was thinking that I might install vents on the sides if needed!
Thanks to all!
Don
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Old 01-08-2017, 03:51 PM   #2
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Rule of thumb is run your blower for at least 4 minutes before starting and that is it. Normal air circulation at any speed is good enough. Now real life operation is like this. When at slow speeds and very warm temperatures I always turn my blower on for a minute or two to circulate the bilge air. I don't run the blower all the time. It's a waste.

Roger
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Old 01-08-2017, 06:51 PM   #3
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Isn't the blower actually sucking air out of the bilge...?
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Old 01-08-2017, 07:20 PM   #4
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I know, its just that with the vent on the stern facing the rear I would think that there would be little or no air entering or leaving the bilge as both intake and exhaust air flow through the same vent grill!
As I said all of the other boats I have owned or been on had a intake vent on one side and a exhaust vent on the other side of the hull! Usually one scooping air in and one out!
Thanks!
Don
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1987 Seaswerl 18ft C. Cabin 4.3 IO(lost in fire)
1976 16ft. Tahiti 2.5 IO (sold)
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Old 01-08-2017, 07:26 PM   #5
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Can post a picture. I have never heard of a boat design that had the exhaust exiting at the vents. Is it a modified exhaust?
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Old 01-08-2017, 09:43 PM   #6
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Sorry for the confusion, no it is not engine exhaust, that exits through the drive!
Its engine room venting!
On the 2400 SCR the venting for the engine room bilge area is on the transom facing the rear of the boat! Just don't sound right to me! Weard!!
To be able to vent air out you have to be able to get air in!!
Thanks!
Don
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1988 Bayliner 2455 5.0 IO (sold)
1987 Seaswerl 18ft C. Cabin 4.3 IO(lost in fire)
1976 16ft. Tahiti 2.5 IO (sold)
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Old 01-08-2017, 10:00 PM   #7
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Sorry I tried to post a photo of the vent location on the boat but I am computer dumb!
Don't know how to do it!!
Don
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1995 Maxum 2400 SCR 5.7 A1 G2 LUNA DE MIEL
1988 Bayliner 2455 5.0 IO (sold)
1987 Seaswerl 18ft C. Cabin 4.3 IO(lost in fire)
1976 16ft. Tahiti 2.5 IO (sold)
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Old 01-09-2017, 12:21 AM   #8
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No offense, but your boat is now old enough to drink. I think it knows how to breath...
Blower is only meant to clear potential fumes before initial start up. After the engine is running, shut the blower off and have a good ride.
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Old 01-09-2017, 07:38 PM   #9
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Good Morning Speedy!
No offence taken!
I was under the impression that venting a engine compartment was supposed to be passive when the boat was underway! ( Forward and aft facing to vent air out of bile engine room! )
AS to it being old enough to drink that is true, it drinks more than I do!
New boat to me so just trying to learn everything about it good and bad!
Don
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1995 Maxum 2400 SCR 5.7 A1 G2 LUNA DE MIEL
1988 Bayliner 2455 5.0 IO (sold)
1987 Seaswerl 18ft C. Cabin 4.3 IO(lost in fire)
1976 16ft. Tahiti 2.5 IO (sold)
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Old 01-09-2017, 10:50 PM   #10
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I believe the manual will tell you to run the blower below cruising speeds. I do that when I remember to, but haven't had a heat problem or anything when I don't
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Old 01-12-2017, 10:10 PM   #11
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Blowers are for venting any gas fumes which could cause an explosion or fire. Since gas fumes are heavier than air the tubes are at the lowest points in bilge so as to pull all fumes from bilge area. Turning on blowers 3 to 5 minutes before starting is plenty of time. If there are any gas fumes then the smart thing to do would be to find out where and why they got there.
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Old 02-03-2017, 10:26 PM   #12
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Hi Donald the 2400 has the blower exhaust as well as bilge air intake both at the back of the boat. IMO not a good design as the fresh air intakes should be on the sides and forward of the exhaust.
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