______________________________ Reply Separator _________________________________
Subject: Re: Tohatsu/Nissan 3.5 external tank info
Author: Non-HP-hlg (hlg@pacbell.net) at hp-boise,mimegw7
Date: 3/25/99 1:27 PM
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West Wight Potter Website at URL
http://www.lesbois.com/wwpotter/
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Derek:
My Seagull also does not accommodate an external tank. I have considered
the following solution, but haven't been motivated enough to try it, since
I use my motor as little as possible. But I could have used the system on
my recent 30-mile motorsail in the South Bay.
How about strapping an external tank on the forward deck and running a hose
or tubing back to the built-in tank on the motor, using gravity feed? That
also moves the weight forward, usually desirable. You would have to install
a fitting in the motor's tank for the fuel line. The vent on the motor's
tank would be kept closed, but the forward tank would have to be vented.
An additional advantage is that the tank is external, where ventilation is
not a problem, and it could be installed only when a lot of motoring is
anticipated. A possible disadvantage would be carrying the weight of the
fuel relatively high in the boat, which might have a slight negative
effect on stability.
Harry
Derek wrote:
>Thanks to everyone who replied to my request on how to put an
>external tank on a 3.5 Tohatsu. (I am finally following up on this ...
>sailing season is here!)
>
>The problem with the 3.5 is that it does not have a fuel pump, which
>is required for a external tank. Several helpful list members sent
>me testimonials and even a page out of the shop manual on how
>to modify the 3.5 to have a fuel pump.
>
>I just got off the phone with Nissan, and it appears that it is
>easy to add the pump to a pre-1992 engine, but for an engine
>of my newer vintage it would require taking the block apart and
>drilling thru the head to get the suction power to run the
>fuel pump. This is not really an option for me, so it looks
>like I will have to stick with unpleasant water-way refueling
>of the tiny internal tank.
>
>Derek Jensen
>P-15 # 694 "El Nino"
>Portland, OR