1973 Evinrude 25 (Upper Crankshaft Oil Seal) &

yelladog · #1 August 20th, 2006, 11:22 PM

Just wondering if it is a big project to change the upper crankshaft oil seal. I also have a suzuki and its not much trouble. Just a matter of removing flywheel, stator assembly and a plate that has the seal in it. Noticed on this motor it doesnt look so easy. Thanks Alot

yelladog · #2 August 21st, 2006, 02:04 PM

Quote:

Originally Posted by yelladog

Just wondering if it is a big project to change the upper crankshaft oil seal. I also have a suzuki and its not much trouble. Just a matter of removing flywheel, stator assembly and a plate that has the seal in it. Noticed on this motor it doesnt look so easy. Thanks Alot

yelladog · #3 August 21st, 2006, 02:05 PM

Thoughts Anyone?????

Paul Moir · #4 August 21st, 2006, 03:43 PM

OMC made a seal puller that you could thread into the seal an pull it out. Picture a tapered piece of pipe that was threaded. You would thread this into the old seal over the crankshaft and pull it out like a wine cork.

In the absence of the puller, use this technique I learnt from OBJ. Drill a couple holes in the metal part of the seal, and thread in a pair of small sheet metal screws almost all the way. Then use the screws to pry the old seal out using a slot screwdriver.

Either way is far easier than disassembling the engine.

yelladog · #5 August 21st, 2006, 04:09 PM

Thanks Alot, That sounds like a plan. I'll give it a shot and your right, it has to be easier than spliting the crank case.

R.Johnson · #6 August 22nd, 2006, 12:00 AM

Keep in mind that if you pry on the magneto bearing boss that surround's that bearing, and seal, and is only about 1/8" thick, if you break it, you are looking at an entire engine block. If it is not leaking, leave it alone, or take it to a dealer. I have seen more than one of them broke off with a make shift attempt.