I had a leaking fuel tap on my 275. There is stuff you can get to slap on oil tanks to stop leaks - from a pollution prevention viewpoint. I tried it on my fuel tap with no success. However it might work on a staionay leak so to speak. I think it was made by Drizit (you may be able to find it through google). As said it is intended to slap on leaks to stop pollution and may work if you are lucky!

Tim