Tomcat fuel system
- Thread starter cjcarman
- Start date
Pacificcoast101
Member
We've had the same issue for eight years. Usually we smell it right after refuelling or whenever we go more than fifteen knots or the wind is over fifteen knots. It doesn't happen all the time though. When we filled up earlier this year it was so bad we had to leave a window open for a week. I filled up last Wednesday and drove home in bouncy seas and didn't get a trace of odor. Go figure.
I've looked and can't find where the odor is coming from. There is no fuel leak or we would smell gas all the time. I installed clamshells over the vents and that seemed to help but sometimes it doesn't.
I've looked and can't find where the odor is coming from. There is no fuel leak or we would smell gas all the time. I installed clamshells over the vents and that seemed to help but sometimes it doesn't.
cmetzenberg
New member
I've never had this happen on mine. I'm curious on the integrity of your fill and vent hoses to you tanks. When you're fueling close all your doors and windows to ensure no vapors are drifting in.
Check the fuel tank sender units on the tops of the tanks., as well as all of the hoses as suggested above. The clam shells over the vents are a very good idea, since we had water from rain or splash, due to the position of the ports on the vent fittings locations. The Clam shells solved that issue.
gulfcoast john
New member
CJ,
Only happens with us when we over-fill the tanks. Gauges are primitive rheostats. Use a strong light or thin wooden dowel to dip and make sure your actual gas level isn't inches under the fill deck plate (in our case) rather than down in the tank. (Agree with Bob that the sensor gauge cheap washer is always a suspect Leak Point). Once actual liquid gas comes surging out the vents (not just vapor) in the slop it can end up in the cockpit at cruise depending on wind and waves. Clamshells are on The List.
Always close the aft door above idle to prevent station-wagon effect of both engine and gas vent fumes. Refueling on the trailer the bow will be (or should be) a bit higher than refueling in the water.; check where your tank gauge sensor is loca ted and take that into account. Lastly, all the gas hose manufacturers advise replacing all gas hoses at 10 years from mfg date (stamped on hose), perhaps MUCH sooner if prior owner used ethanol, which 2006 era gas hoses were never engineered to tolerate (the first ethanol issues were reported to USBOAT IN 2006).
I know you guys need to max out the gas load, but if you don't I bet your issues will be resolved.
It's a great boat, enjoy!
John
Only happens with us when we over-fill the tanks. Gauges are primitive rheostats. Use a strong light or thin wooden dowel to dip and make sure your actual gas level isn't inches under the fill deck plate (in our case) rather than down in the tank. (Agree with Bob that the sensor gauge cheap washer is always a suspect Leak Point). Once actual liquid gas comes surging out the vents (not just vapor) in the slop it can end up in the cockpit at cruise depending on wind and waves. Clamshells are on The List.
Always close the aft door above idle to prevent station-wagon effect of both engine and gas vent fumes. Refueling on the trailer the bow will be (or should be) a bit higher than refueling in the water.; check where your tank gauge sensor is loca ted and take that into account. Lastly, all the gas hose manufacturers advise replacing all gas hoses at 10 years from mfg date (stamped on hose), perhaps MUCH sooner if prior owner used ethanol, which 2006 era gas hoses were never engineered to tolerate (the first ethanol issues were reported to USBOAT IN 2006).
I know you guys need to max out the gas load, but if you don't I bet your issues will be resolved.
It's a great boat, enjoy!
John
