Mariner 30 Lower unit

[HughN]

Arghhh! This engine is driving me mad....

On the side of the lower unit are three small holes - much smaller than the drain/fill holes. Any idea what they are for? Gearbox oil is leaking from them, which doesn't seem right....

Turning the prop there is regular resistance, which doesn't seem good either.

[Locozodiac]

Those 3 small holes are water drains, will see water exiting when using muffs or removing tail from water. You shure it's gearbox oil or it's combustion leftovers if being a 2 stroke motor ?

Happy Boating

[HughN]

Originally Posted by Locozodiac

Those 3 small holes are water drains, will see water exiting when using muffs or removing tail from water. You shure it's gearbox oil or it's combustion leftovers if being a 2 stroke motor ?

Happy Boating

It smelt of gear oil and stained the stones it dripped onto. I'll take a sample and check it properly.

If only yet made all different lubricants,etc., very bright vivid colours all leaks might be easier to trace!

Thanks
Hugh

[Locozodiac]

My 2 stroke engines sometimes leaks throw small hole located at lower leg, it's dark browm/black and gummy, but it's 2 strokes combustion leftovers. Check leg oil level if suspecting you have a leak somewhere or discard having water intrussion which generally turns gearbox into white looking oil.

Happy Boating

[HughN]

Yep, it was gummy stuff.

A good run at WOT helped clean things out a bit.

The oil level is fine. I will ignore it!

Thanks
Hugh

[Bosbok]

Hi i had the same problem on my one motor its the seal on the gear selector, if you take the lower unit off u will see it at the bottom of the selector shaft it looks like a little Cv boot

Hope this helps

[HughN]

Yikes!

Thanks for the tip - I'll go and have a look.

Cheers
Hugh