Don S.
Cadet
- Joined
- Aug 14, 2007
- Messages
- 15
Hello All, I have done some searching, but nothing really addressed this issue I am having.
Both My Outter exhaust cover and Inner Exhaust cover gaskest were leaking. Outter was leaking excess oil down onto the Lower unit. Decided to pull the bolts and fix this problem. To say the least I have opened a Can of worms. I now have 6 Grade 5 1/4-20 Bolts that broke off, and one 10-24 Stainless steel Machined screw that have broken.
The issue is the inner exhaust gasket was leaking onto the center bolts and had rusted them in place. From the looks of it this motor has never been apart, i.e. 36 years of neglected service possibly.
The issue being, that these bolts broke while trying to remove them and it seems that the rust has seized them in the holes. I have used a punch to ping them to gt them loosened. Kroil oil saok for a week. I have drilled them up to 3/32 hole all the way through. Tried Easy outs, Vise Grips, and nothing so far has worked. I am a little weary to use heat 1.) Beacuse of possible melting of the aluminum alloy. 2.) Possibly changing the crytaline struckture of the alloy and making it soft, or possibly brittle. 3.) This is the exhaust are and is coated with oil and some carbon build up, kind of afraid of igniting this stuff.
I have ran out of patients and have been at this issue for the last month. Seems about the only solution is to have a machine shop get them out, Cause most other outboard mechanics where I live won't touch this vintage. I am seeing now why that may be so.
Just a little history, I bought the outboard and 1979 16' Marlin with a 92 easy loader trailer for $800 bucks not running. Which before this issue I had got it running pretty good.
Both My Outter exhaust cover and Inner Exhaust cover gaskest were leaking. Outter was leaking excess oil down onto the Lower unit. Decided to pull the bolts and fix this problem. To say the least I have opened a Can of worms. I now have 6 Grade 5 1/4-20 Bolts that broke off, and one 10-24 Stainless steel Machined screw that have broken.
The issue is the inner exhaust gasket was leaking onto the center bolts and had rusted them in place. From the looks of it this motor has never been apart, i.e. 36 years of neglected service possibly.
The issue being, that these bolts broke while trying to remove them and it seems that the rust has seized them in the holes. I have used a punch to ping them to gt them loosened. Kroil oil saok for a week. I have drilled them up to 3/32 hole all the way through. Tried Easy outs, Vise Grips, and nothing so far has worked. I am a little weary to use heat 1.) Beacuse of possible melting of the aluminum alloy. 2.) Possibly changing the crytaline struckture of the alloy and making it soft, or possibly brittle. 3.) This is the exhaust are and is coated with oil and some carbon build up, kind of afraid of igniting this stuff.
I have ran out of patients and have been at this issue for the last month. Seems about the only solution is to have a machine shop get them out, Cause most other outboard mechanics where I live won't touch this vintage. I am seeing now why that may be so.
Just a little history, I bought the outboard and 1979 16' Marlin with a 92 easy loader trailer for $800 bucks not running. Which before this issue I had got it running pretty good.