Grease on bolts???

Twin 1991 Yamaha 130TXRP outboards
The steering arms have rusted all the way through. Port side is broke and starboard side bends easily.

I have disassembled the port engine. What a PITA!!! On almost all of the bolts, there seems to be some kind of grease on the threads. Those that had grease are nice and rust free and came out without issue. The others have corrosion from the aluminum (bolts are stainless) that made their removal very tricky. I was able to get the port side disassembled without breaking any bolts. I did have a couple that almost broke as the heads aren't quite flat anymore but with patience and lots of PB they came out. I had to grind off the head of one of the lower rubber mount bolts. The nut came off but the bolt was stuck in the housing (no grease) that hold the bottom of the steering arm shaft.

So is it normal practice to grease up bolts during assembly? If so, I'm a big believer in it after taking this salt-only motor apart. Could this be some kind of marine anti-seize perhaps?

Chuck

[tunnels]

Twin 1991 Yamaha 130TXRP outboards
The steering arms have rusted all the way through. Port side is broke and starboard side bends easily.

I have disassembled the port engine. What a PITA!!! On almost all of the bolts, there seems to be some kind of grease on the threads. Those that had grease are nice and rust free and came out without issue. The others have corrosion from the aluminum (bolts are stainless) that made their removal very tricky. I was able to get the port side disassembled without breaking any bolts. I did have a couple that almost broke as the heads aren't quite flat anymore but with patience and lots of PB they came out. I had to grind off the head of one of the lower rubber mount bolts. The nut came off but the bolt was stuck in the housing (no grease) that hold the bottom of the steering arm shaft.

So is it normal practice to grease up bolts during assembly? If so, I'm a big believer in it after taking this salt-only motor apart. Could this be some kind of marine anti-seize perhaps?

Chuck

Be careful what grease you use , go to a boat shop and ask what there mechanics use !.
I use lanocoat grease made from the lanolin from sheep's wool on every thing i have ever taken apart and never had a problem.
I also wash down with warm soapy water and spray crc all over everything when its dried off .Be generous with it so it gets to all the places you cant see
Seems when the motors are assembled theres no grease used at all !. Stainless and aluminum + salt always stick together ! best loctight combination Ive come across ever !.

Yamaha , OMC Mercury and all the others have tubes of grease that are for different applications, . Handy to keep in your tool box in the boat !

[Dennisg]

HI, I have always used Permatex never seize, since about the mid 70's, on every nut and blot that I had to removed and put back, on all my outboards, and I do most of the work myself, and have never had any problems, never. You can get at any auto supply. hope this answers your question.
Dennis

[jb123]

there is a marine grade never seize tho it has gotten a bit expensive recently....

i use marine grease or never seize.

Try to get hold of some Fluid Film WRO-EP gel, this is made by Eureka Chemical company in San Francissco, put this on all threads and it will last for 20 years without any problems, in fact the FF aerosol can be use on all engine and boat parts, it will out perform any other marine product on the market today.

Check out this link

Fluid Film® | Corrosion Preventative, Lubricant and Rust Inhibitor

[pitahui]

thread sealer with teflon

The best thing I have found to use on all the screws and bolts on my engines is Oatey pipe thread sealer with Teflon. I get it at home depot in the plumbing section. The sealer is inexpensive, easy to get, and never hardens. The Teflon helps prevent the stainless screws/bolts from galling the aluminum engine parts.
I run exclusively in salt water and have been using this stuff for almost 10 years. I have never had a problem removing any screws/bolts since.

info:
http://www.oatey.com/apps/catalog/in..._White_PJC.pdf