I did the same thing as some of the other guys -- replaced my combo unit with separate units run off the existing switch, but I did add separate fusing for each (replacement units came with in-line fuses so I just used them). Been running this way a good 20 years now with no issues.
Because the engine is in an enclosed compartment where fuel vapors can build up, you need to evacuate them to prevent an explosion. ALWAYS run the blower for several minutes before you turn the key to start it. I also open my engine hatch for added ventilation during the first start of the day and smell for any signs of fuel. Another thing you need to be aware of is the fuel pump vent. One side of the diaphragm is vented to atmosphere -- your engine compartment. That means when the diaphragm (actually a dual-diaphragm for marine applications -- another difference from autos) eventually ruptures it will start spilling fuel into your bilge. Fuel in bilge = major explosion risk you don't want to encounter. I tapped my carburetor and ran a line from the vent to the fitting such that any fuel expulsion now drains harmlessly into the carb (which is of course protected by a flame arrestor -- another safety feature you need to ensure is on you boat -- sorry, I forgot to check when you sent you pics). While we're on the topic of thermal events, be sure you have an operable A-B-C fire extinguisher on board too -- its a coast guard requirement and just plain good sense.
Andy
'67 Reveler
----- Original Message -----
From: "Greg Tabers" <gtabers5572@...>
To: "Evinrude & Johnson Boats of the 1960's and 70's" <omc-boats@...mate.com>
Sent: Thursday, August 27, 2009 5:19:09 PM GMT -05:00 US/Canada Eastern
Subject: Re: [OMC-Boats] Blower on '67 Johnson Surfer?
Thanks everyone for the input. I really appreciate it. Yeah I printed this wiring diagram already and it didn't show a blower from what I can remember. (I may be wrong) This is my first boat, so pardon the ignorance, but what is the purpose of the blower?
Thanks again,
Greg
--- On Thu, 8/27/09, Lee Shuster <lks@...> wrote:
From: Lee Shuster <lks@...>
Subject: Re: [OMC-Boats] Blower on '67 Johnson Surfer?
To: "Evinrude & Johnson Boats of the 1960's and 70's" <omc-boats@...mate.com>
Date: Thursday, August 27, 2009, 12:09 PM
Wiring Link left-off last msg: sorry:
http://www.hhscott.com/evinrude/images/wiring/68_v6_ALL_WIRE.jpg
Most browsers will CLICK-to ZOOM IN for close-up viewing
On Aug 27, 2009, at 1:04 PM, Lee Shuster wrote:
As originally built by OMC, your boat's combo Bilge Pump/Blower was located in the bilge "cutout" located directly under the engine oil pan. It's fairly common for these to get tossed as there is no similar combo product offered today, most likely because a combo product might not meet current ABYC standards. So might not be able to find it, because it's long gone. But the original wiring and switch is most likely still in tact.
You cab view the original factory OMC wiring diagram here (your boat will be wired identically). BTW, it was extremely RARE for any boat manufacturing to build and DOCUMENT their products' electrical systems in the Sixties, as OMC did.
It's just another reason the old gals are worth saving, IMHO.
You will need to install additional wiring/using/switch to accommodate both a ventilation blower and a new dedicated bilge pump.
IMHO, the best way to do this is install the new blower on the EXISTING helm switch and use a new switch/wiring/fuse for the new BILGE pump. I'd highly recommend a AUTO float-sensor switch with a 3-POSITION SPDT SWITCH, (SPRING LOADED, MOMENTARY ON). THIS WAY YOU CAN SELECT AUTO - OFF - MANUAL. FOLLOW THE wiring instructions from the float/bilge pump and you'll be fine. Use the recommended Marine wiring colors, so the next owner has a clue what you've done or better yet document you work with a diagram or drawing, like OMC did.
recommended reading:
http://www.ezacdc.com/Scripts/prodView.asp?idproduct=29
I'm often surprised by how much water accidently "splashes" into the bilge. But with a float-switch and the helm switch in AUTO -- it's a no brainer.
Lee
On Aug 27, 2009, at 11:53 AM, Greg Tabers wrote:
Sorry, let me clarify. Just read my first post and I can see some confusion in my wording. My question is if there is a blower, where does the wiring go from the toggle and where is the blower located?
--- On Thu, 8/27/09, BreAnne Upcott < h2onsnow@... > wrote:
From: BreAnne Upcott < h2onsnow@... >
Subject: Re: [OMC-Boats] Blower on '67 Johnson Surfer?
To: "Evinrude & Johnson Boats of the 1960's and 70's" < omc-boats@...imate.com >
Date: Thursday, August 27, 2009, 10:13 AM
Your blower should be tied in with the bilge pump. Same switch on the dash as the bilge.
On Thu, Aug 27, 2009 at 12:38 PM, Greg Tabers < gtabers5572@... > wrote:
I have been trying to figure out where the toggle goes for the blower on my boat. When I checked the wiring diagram though it doesn't show the blower. Is there a blower on the boat or not? If there is, can someone tell me where to trace it to.
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