Permanent Fuel Tank

[rinkerdinker1]

I am considering adding a permanent fuel tank for my 76 Johnson v-4 85HP; There seems to be a requirement to vent the tank? via penetration through an area in the aft section of my fiberglass boat; do I have to make two holes in my boat? 1 for the fuel fill and another for the tank ventillation?; what is the purpose of this? Is there an alternative to drilling all these holes in my vessel? Your help is appreciated.
Sincerely
RD1

 

[tx1961whaler]

Re: Permanent Fuel Tank

The tank must be vented to keep from pulling a vacuum in the tank by the fuel pump. The vent is vented overboard to prevent overflow from puddling in the boat.

 

[boobie]

Re: Permanent Fuel Tank

I do believe they make fuel fillers that have a vent built into them. This may save you from drilling extra holes. Check with West Marine.