You are here:

Boat Repair/OMC upper unit question

Advertisement

Expert: Everett Peacock - 10/19/2009


Question

omc upper unit
Hi sir, I thought I was checking the upper unit gear oil and there is a screw on the left side of case surrounded by rubber. I was trying to unscrew this and it caved into the housing. Water began coming out. Is this a water drain plug/freeze plug? The screw and whatever is attached to it from inside wont come out througn the opening. I attached an image I found showing the screw. Any help is greatly appreciated!

Answer
there is no upper drive oil and lower drive oil..it is together and checked by the screw on top of the drive...the one you pulled is a freeze plug...the only way to replace it is to split the two halves apart and replace the screw and the c-clip is on the inside....if you can find something maybe a rubber plug to fill it it will work....

Everett Peacock

Expertise

Marine repair questions

Experience

35 years experience boatmansbargains.com

Organizations
Taught Marine electronics at NOVA CC IN ALEXANDRIA VA

Education/Credentials
certified, Yamaha outboards,yamaha stern drives, Mercury outboard, Mercruiser, Evinrude. Johnson, Mariner, suzuki, Volvo Penta, Honda,

Awards and Honors
service exelence award ( yamaha)

©2012 About.com, a part of The New York Times Company. All rights reserved.