Yamaha Outboard Oil Tank Sensor Leak

A plastic tie wrap snugged around the rubber lip usually cures the leak.

Yamaha outboard oil tank sensor leak.

I have a 2004 90 hp yamaha ob. Eventually the main oil tank overfills and spews excess oil out a vent tube into the air silencer box. The yamaha outboard alarm system can fail just like any other system on your outboard. I am the second owner of this matching 2007 19ft.

I decided to also replace the drain line that comes from the bottom of the oil tank and re enters at the top of the tank. Jan 23 2010 1. I put thread tape around the two small raised ridges about 3 wraps that are down the tube a little and around the tank lip where the cap snaps over. Oil sending unit leak i just found this same leak from the oil sending unit on my 06 90hp after taking the boat out of winter storage.

While the outboard is tilted a leaking rubber cap on the main tank can result from improper assembly or from twisting out of place. Noticed the last few times out that i have an oil leak coming from this area of the outboard see pic. G3 and 90 tlrc. Troubleshooting the alarm system includes making sure the horn associated with the alarm works making sure the warning light comes on and the horn sounds when the oil level drops below acceptable levels and ensuring the warning sounds if the engine overheats.

Piston picture at end. Yamaha could do a better job of engineering this bit. Oil leak on yamaha 4 stroke outboard discussion in boats and motors started by bmagill jan 23 2010. Can answered by a verified marine mechanic.

Its leaking oil at the reservoir tank ware i think its the low warning oil sensor. So my thought is forget tie wraps and replacement of oil sending units i want to fix this thing permanent with an external oil tank like on the bigger outboards.