Re: [OMC-Boats] Engine compartment venting

My '64 Deluxe does have the rear vent a/w/a the intake & exhaust scoops w/
duct hose. My original equipment (OE) blower failed so I installed an
aftermarket blower through the lower aft area of the cowl. I wired it to the
OE switch and it works well.

Kevin J. Beliveau

GT Plastics, Inc.

P: 989.739.1112 ext.13

C: 989.305.0805

F: 989.739.7393

E: <mailto:kjbeliveau@...> kjbeliveau@...

W: <http://www.gtplastics.com> www.gtplastics.com

  _____

From: omc-boats-bounces@...
[mailto:omc-boats-bounces@...] On Behalf Of Jeff LaCoste
Sent: Wednesday, July 23, 2008 1:57 PM
To: Evinrude & Johnson Boats of the 1960's and 70's
Subject: Re: [OMC-Boats] Engine compartment venting

Hi Jeff,

I've had 2 Johnson Deluxe boats and neither of them had any type of vents or
hoses like the ones being mentioned, only one hose from the bilge to the
blower to the scoop on the rear passenger side.

J

On Jul 23, 2008, at 10:47 AM, JEFF DOOD wrote:

nope. nada. just the bilge outlet. i even went back to the pre

paint job photos i took after i bought it and no scoops there either.

do you have a deluxe also? scoops on yours?

On Jul 23, 2008, at 12:06 AM, D.J.Knight wrote:

Hey Jeff look on the outside back corners about a foot towards the

bow. Do

you have scoops there. They are only about one inch open and 5-6

inches

across.

-----Original Message-----

From: omc-boats-bounces@...

[mailto:omc-boats-bounces@...] On Behalf Of JEFF DOOD

Sent: Tuesday, July 22, 2008 4:00 PM

To: Evinrude & Johnson Boats of the 1960's and 70's

Subject: Re: [OMC-Boats] Engine compartment venting

On Jul 22, 2008, at 10:23 AM, mckeown wrote:

Running the blower while underway is unnecessary if your factory

venting system in intact. The original venting was designed to meet

USCG specs. My '71 has two rear-facing vents with long 3" hoses

attached. These hoses run to the bottom of the bilge so that

whenever the boat is in forward motion, any fumes are being pulled

out of the boat.

ahh - that's what those are for. i think i am missing the hoses

then.

There are also two forward-facing air intakes that supply air for

cooling and combustion to the engine compartment.

don't have these. not on cowling, not on hull. but then again,

are we talking the same boats here? i have a johnson deluxe, single

engine I/O. engine and cowling sit right in the middle of the

back. bubble cowling covers just the engine - leaving those two nice

useless too small for jump seat areas on either side of the

compartment. my cowling does have a nice angled flat section on

the front where it looks like something is supposed to go - either an

emblem or a grill or something. but i find it hard to believe that

just got left off somewhere. anyone else have this exact same

cowling?

so it looks like all my engine is getting is whatever it can draw in

from the back grills, without the hoses that are suppose to be

there.

Any addition of grilled openings would only increase noise; you'd

see no change at all in engine cooling or performance. Remember,

unlike a car where all waste heat comes out of the radiator and

through the engine compartment, waste heat in our boats goes into

the lake!

Bob

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Received on Wednesday, 23 July 2008