plastic gas tank (swelling)

**impdog** · 06-05-2020, 04:44 PM

Came with my new tohatsu motor with the vent open it gets pretty big and has some pressure when i crack the big cap to let it out? seems lately since the weather warmed up its getting hard to start motor only has 7 hours on it.

**Mbsbeek** · 06-05-2020, 05:05 PM

Does the new line from tank have a (FDV) fuel demand valve. New portable tanks installed buy dealers, they are supposed to install that valve in fuel line , after 2006. It's supposed to work as a anti-siphon / and tank pressure release. Some new tanks have vent and some don't. I've ran across about 4 this yr. With same problem . valves not working rite.

**Mbsbeek** · 06-05-2020, 05:18 PM

2011 not '06 they don't want vapors venting. I'd call dealer and ask what to do. What type warranty did u get ? I know what I've told customer's to do and had positive results.

**impdog** · 06-05-2020, 06:02 PM

The hose has them nice slip connectors for hook up i like but the hose has just the primer bulb, iam thinking i got a 5 year warranty on this motor its a 2020 runs awesome when its running.

**shadboy** · 06-05-2020, 07:54 PM

I had the same problem. I started leaving the gas cap a little loose so pressure could escape. Maybe that will work on yours.

**impdog** · 06-05-2020, 08:05 PM

Iam gona release all the pressure from the tank before i try to start it and see what that does cant hurt.

**Mbsbeek** · 06-06-2020, 12:49 PM

Yes or drill a small hole in cap.

**need2befishin** · 06-06-2020, 05:43 PM

My cap had a tiny hole in the top and a small rubber valve on the bottom. (shaped like a cone) The rubber gummed up and wouldn't let it vent and it did the same as your is. I cut the rubber valve off and it hasnt happened since.