Classic AquaSport

Aquasport Mechanicals - things that need a wrench, screwdriver or multimeter => Engines & engine woes => Topic started by: allen456 on November 26, 2008, 04:54:23 PM

Title: Oil on motor
Post by: allen456 on November 26, 2008, 04:54:23 PM

Anyone know what is causing oil to leak  out of the motor from the lower cowling. This is a 1981 Johnson 175.  Let me know what ya'll think.

(http://i269.photobucket.com/albums/jj74/allen456/Examples105.jpg)

(http://i269.photobucket.com/albums/jj74/allen456/Examples104.jpg)

Title:
Post by: RickK on November 26, 2008, 05:32:47 PM

I'm not sure if they had VRO back then.  If they did, then I'd check the tank and connection.  If not, what ratio of gas to oil mixture you using?  50:1?

Seems normal to have a little fuel/oil mixture dripping out of the carbs.  Haven't seen it that black before though.  Maybe try some "purple stuff" to clean it off and then watch it.

Title:
Post by: allen456 on November 26, 2008, 07:24:59 PM

When I picked up the boat there was no sign of this a couple of weeks ago(then again it hadn't been run in a few years) This is a basic 2 stroke that I mixed 50:1 on the first run and 45:1 on the second due to the excessive smoke(even for a two stroke).  I am open to options here. There are not any sign of the oil near the carbs or in the upper cowling.

Title:
Post by: slippery73 on November 26, 2008, 07:57:36 PM

Any smoke coming out of the top area of the motor? A lot of times the water passages will get corroded out and let exhaust and water exit where its not supposed to. Check for corrosion under the hood areas, also pull the spark plugs and check them out.

Title:
Post by: allen456 on November 27, 2008, 02:24:00 PM

I have seen a little smoke out of the top everyonce in a while, thought that it was just the way the smoke was blowing around with the motion /wind.  The plugs show a little sign of extra oil but nothin crazy.  Are there seals under the lower cowling?

Title: Re: Oil on motor
Post by: bdtsr on January 12, 2009, 12:05:47 AM

What slippery73 said. Looks like oil residue from an exhaust leak.

Title: Re: Oil on motor
Post by: gw204 on January 22, 2009, 10:38:26 AM

Could also be the lower crankshaft seal.  Can you get those two pieces of bottom cowling off so you can get a look at the base of the powerhead?

Title: Re: Oil on motor
Post by: allen456 on February 12, 2009, 09:59:56 PM

Took the lower cowling off, and took show pics, let me know waht you think.  
(http://i269.photobucket.com/albums/jj74/allen456/inwater104.jpg)
(http://i269.photobucket.com/albums/jj74/allen456/inwater105.jpg)
(http://i269.photobucket.com/albums/jj74/allen456/inwater106.jpg)