Mariner 2HP Gas Tank

[BUSTER7]

I've got a leaky integral fuel tank on my Mariner 2M outboard. I believe the motor is about a 1980 vintage. Serial number is: 6A1 065514. It's a plastic 1 liter tank. I can't find any source of a replacement tank. It may be repairable, but I'm willing to buy a new tank, if available. Anyone know a source of older Mariner parts? Buster7

 

[Sea Rider]

Is the fuel tank squared or rounded one, a pic would help...

Happy Boating

 

[QBhoy]

Haven’t heard of this happening before to be honest.
move heard of the tanks leaking from the vent on the full cap though. Very very common. Also common to leak fuel from carb, should fuel valve be left on.
has the plastic tank be actually ruptured or punctured ?
If it has...and it helps you any. It’s the same engine as the Yamaha 2hp the same age.

 

[racerone]

Have seen these PLASTIC , junk tanks cracked.----Sad that replacement plastic parts are not available.-----A problem today and an even bigger issue in the future for those that will be running gasoline powered outboards.----Perhaps E-bay has a listing for one.

 

[QBhoy]

Have seen these PLASTIC , junk tanks cracked.----Sad that replacement plastic parts are not available.-----A problem today and an even bigger issue in the future for those that will be running gasoline powered outboards.----Perhaps E-bay has a listing for one.

Fair play. Just never been aware of it on these old Yamaha engines. Still so many of them about from the 70’s and early 80’s like this. Just thought I’d ask if it was the usual issue of leaking from the vent or carb.

 

[Sea Rider]

If leaks through the carb it's a float needle/seat issue, if leaks where the fuel hose attaches to the carb's fuel entrance it's a hose/clamp issue. What have seen is fuel leaking through the fuel cap specially during hot summers due to closed air vents which will increase exponentially the tank's inside pressure when fuel heats up. In such case scenario is better to leave the air vent opened during on On/Off operation specially when boating on very hot summer days...

If the cap seal is in excellent sealing order should not leak there unless the cap was not screwed firm. Don't know about the quality of a Yam internal tank, but seen rude careless boaters that looked more as lumberjacks breaking such tanks in low HP motors. Check Yam's internal fuel tanks in the 2-4 stroke 4-5 HP range for availability.

Happy Boating​

 

[QBhoy]

If leaks through the carb it's a float needle/seat issue, if leaks where the fuel hose attaches to the carb's fuel entrance it's a hose/clamp issue. What have seen is fuel leaking through the fuel cap specially during hot summers due to closed air vents which will increase exponentially the tank's inside pressure when fuel heats up. In such case scenario is better to leave the air vent opened during on On/Off operation specially when boating on very hot summer days...

If the cap seal is in excellent sealing order should not leak there unless the cap was not screwed firm. Don't know about the quality of a Yam internal tank, but seen rude careless boaters that looked more as lumberjacks breaking such tanks in low HP motors. Check Yam's internal fuel tanks in the 2-4 stroke 4-5 HP range for availability.

Happy Boating​

Quite common for the wee seal on the vent to be past its best on them over the years. When I say leaking from the carb, I probably should have added that I meant when the engine is stored or lying on its side, it happens if fuel not turned off or left over fuel out the carb.

 

[Sea Rider]

Quite common for the wee seal on the vent to be past its best on them over the years. When I say leaking from the carb, I probably should have added that I meant when the engine is stored or lying on its side, it happens if fuel not turned off or left over fuel out the carb.

In such case shut the tank's fuel valve and run carb dry. As you probably won't know when will be your next boating day, turn the motor upside down and remove the fuel remains into a container. Preffer a zillion times to run fresh fuel on my next outing than stored ones for long time terms.

Happy Boating​

 

[QBhoy]

In such case shut the tank's fuel valve and run carb dry. As you probably won't know when will be your next boating day, turn the motor upside down and remove the fuel remains into a container. Preffer a zillion times to run fresh fuel on my next outing than stored ones for long time terms.

Happy Boating​

Totally agree...I was just suggesting what might have happened to the guy who originally asked the question