Coleman (Tohatsu) 5HP 4-stroke leaking lower unit oil

[gibbywmu2000]

Hi Everyone,

I have a 5HP Coleman, which I believe is a Tohatsu, 4-stroke motor. This was purchased brand new last year, and it runs great. I've noticed recently that there seems to be a slow leak coming from one of the lower unit bolts (see photos). The strange this is, I've never loosened this bolt at all, and I checked this morning and it seems to be tight. Its not leaking enough oil to cause a catastrophic failure of course, maybe 1 drip per day I would say at the most.

I replaced the lower unit gear oil last fall w/out any problems at all. It is a little disconcerting considering this motor is brand new that it would be leaking gear oil out of a bolt that has never been touched.

Anyone have any recommendations on what else to look for? Both lower unit gear oil plugs are tight, and of course its not leaking where those are at (the oil is not leaking from that top plug and then down to the bolt, as far as I can tell).


I could me missing something, hopefully someone can point out something I may have looked over. Let me know if you are able to view the pics, it seems as they are uploading very small for some reason.

Please try these links to view the pics:

https://www.fortune3.com/gibbywmu2000/coleman1.JPG

https://www.fortune3.com/gibbywmu2000/coleman2.JPG

 

[TGuy]

The Coleman is not a Tohatsu. Coleman is made by Parsun outboards in China. And I think the Parsun brands are copies of Yamaha's. You'll probably need to find a forum that deals with either Coleman, Parsun or maybe Yamaha. Or take it back to your Coleman dealer for warranty repairs.

 

[pvanv]

What is your crankcase oil level? That bolt attaches the LU to the driveshaft housing, and there is no oil inside it. But if the crankcase is overflowing, it might drip out there. TGuy is right, it is a Parsun, and should be under warranty.

 

[gibbywmu2000]

Thanks Pvanv! I changed the crankcase oil level last fall, so it should be exactly at the full level (not overfill), but just in case I will check again tonight. I remember removing the cover several weeks ago, and I inspected the engine and saw no oil overfilling anywhere in the engine compartment.

 

[gibbywmu2000]

Checked the crankcase oil, no problem there. Its definitely not engine oil, this is gear oil. I've posted in the "Other" section for outboards to find out if anyone else has some advice.

 

[pvanv]

That is above the gear oil level. Something odd there. Have it fixed under warranty.