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Wezza
12-01-2005, 05:44 AM
Just a quick question. As we all are aware LRP is getting harder to find and soon will be totally gone. Does anyone know if the lead additive you put into unleaded will affect the mixing of outboard oil? or not worry about it and just start running unleaded?
ba229
12-01-2005, 07:11 AM
How old is the motor and what is it?
Wezza
12-01-2005, 07:50 AM
Its a 1979 Merc 80hp.
vertico
12-01-2005, 10:54 AM
id probably be wanting to use some kind of lead substitute in a motor that old
Spaniard_King
12-01-2005, 11:05 AM
Its a 1979 Merc 80hp.

Use double head gaskets on it, then throw some unleaded at it... she be right[smiley=thumbsup.gif]

Garry
vertico
12-01-2005, 11:12 AM
heh i guess this motor dosent have valves (duh)

yerh if the head is taken off and the motor decompressed somehow (2 head gaskets)
or die grinding the head to reduce compression

this could possibly work

I would talk to your local mechanic :)
Fishin_Dan
12-01-2005, 11:33 AM
Is there a website where I can look up all details (Including this) on my motor (1988 Evinrude)? I've tried evinrude dot com, but it doesn't help at all...
Spaniard_King
12-01-2005, 11:35 AM
Is there a website where I can look up all details (Including this) on my motor (1988 Evinrude)? I've tried evinrude dot com, but it doesn't help at all...

Dan, all evinrude/Johnson engines post 1985 can use straight unleaded...thats a fact!

Garry
Wezza
12-01-2005, 11:47 AM
The local Merc dealer told me to only run LRP. But this is getting hard to do. Can I just put the additive into the fuel with the 2 stroke oil or will it react badly???
Fishin_Dan
12-01-2005, 11:50 AM
Dan, all evinrude/Johnson engines post 1985 can use straight unleaded...thats a fact!

Garry

Thanks mate!
Spaniard_King
12-01-2005, 12:01 PM
Here is a web site with a few details

http://www.maxrules.com/fixgas.html
Wezza
12-01-2005, 12:19 PM
Cheers Spaniard, It clearly states not to use Premium in the older engines due to the high compression. This is good to know, It looks like a new head gasket is in order.... Any volunteers???? Its worth a bottle of rum aint it.. ;D
NQCairns
12-01-2005, 12:34 PM
Wezza LRP is premium unleaded with a bit of uppercyliner lube added, so no change unless your motor has valves! If you would like to run basic unleaded ask your mechanic to retard the timing to suit if it already hasn't been, it will use more fuel and run slower though ::) Talk about getting slowly screwed by gov regulation :(.nq
QldKev
13-01-2005, 07:50 AM
In older 2 strokes, ULP and 2 stroke oil is all you need. #

No upper cyl lub is eneded as you cant get valve recession without valves. #

PULP is too high octane to allow complete combustion in older outboard, don't touch it. #Unless you have had some ULP fuel sitting for a couple of months (looses octane) then top it up with PULP to average the octane back to ULP.

PS. did you know they are removing LRP as the addative has been proven to cause damage in some engine?