envinrude 140 1984 plz help

[oohyeahh]

Just bought an evinrude 140 (1984) rebuilt. On the way transferring it it was on its side in box of truck(no leaks) I put in my shop overnight. When I came out in morning there was a black oil leaking out from the prop area!?! What does this mean?? Is that from being on side or is that bad seals...and its blackish?? thx

 

[bankerjohn]

Re: envinrude 140 1984 plz help

most likely unburnt 2 stroke oil. Does it smell of gas ???

 

[oohyeahh]

Re: envinrude 140 1984 plz help

really has no smell...but it was quite a bit of gritty black oil

 

[bankerjohn]

Re: envinrude 140 1984 plz help

If you can trace the source of the oil back up to the exhaust area, then you can be pretty sure it's just unburned 2-stoke oil residue.

To be 100% sure ... and because you just bought the used motor ... I'd recommend changing the gear case lube. Be sure to use new nylon washers with the drain and fill plugs.

 

[oohyeahh]

Re: envinrude 140 1984 plz help

Thx Allot...yep Gear Oil Clear As Bell!...if You Still There Can You Use A Mercury Prop On Evinrude Moter...or Are They Totally Different...again Thx

 

[ezeke]

Re: envinrude 140 1984 plz help

Those that would work will require re-hub, generally not worth the change.

Count the splines on your prop shaft (13 or 15) so that you get the correct propeller size and work from there. The "boat propellers" tab at the top of the page should help.

 

[Dhadley]

Re: envinrude 140 1984 plz help

The 84 140 E/J has a 13 spline propshaft and a 4 1/4" gearcase. Merc props for both the 4 1/4" and 4 3/4" gearcase are 15 spline. If you find a Merc prop for the 4 1/4" gearcase (generaly around 13 1/4" diameter) you'd have to change the hub for it to work on an OMC case.

 

[oohyeahh]

Re: envinrude 140 1984 plz help

you guys are great! thx allot. do you have a recomondation for an 84 evinrude 140, pushing a 17' aquastar boat prop pitch?

 

[emdsapmgr]

Re: envinrude 140 1984 plz help

A 19 pitch prop is probably a good place to start-then check your top rpm's. You want to hit 5500-5800 rpm at rull throttle with that engine. If that prop is not right on, get the correct one and keep that as a spare.