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Catalina/Capri 25/250 Sailor's Forums

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Question about Johnson Sailmaster

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Ben
Master Marine Consultant

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USA
1234 Posts

Initially Posted - 05/16/2003 : 14:13:51

Hi all,

My boat came with a Johnson 9.9hp outboard motor, I think it's called a Sailmaster, or something like that. It is original to the boat, a 1987 Catalina, and I don't have the manual. Can anyone tell me what the fuel mixture should be? I'm thinking it's 50 to 1, but I'd like some confirmation if possible.

Thanks,

Ben
Adventurous
#5553
C25 SR/SK

Edited by - on

Clay
Deckhand

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USA
22 Posts

Response Posted - 05/16/2003 : 16:36:36

Hello Ben,

I have a Johnson 8 "sailmaster" of the same year and I mix 100 to 1

Look on the motor where the fuel line attaches, mine has a decal with the 100 to 1.

Clay
SAVANNAH

Edited by - on

oldsalt
Admiral

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USA
578 Posts

Response Posted - 05/16/2003 : 20:15:25

Hello Ben,

I have a 1996 Johnson 9.9 Sailmaster which I bought new, as a leftover, in 2000 and the owner's manual says 50 to one.

My previous outboard was a 1983 Evinrude 9.9 Yachtwin, which was exactly the same as the Johnson Sailmaster of the same model year.

I ran it, as recommended by OMC, on 50 to one and it never gave me a lick of trouble and I replaced it only because I figured that after 16 years it didn't owe me any money.

I believe that for a few years around 84-86 or so, OMC tried marketing some Sailmaster/Yachtwin models for which they recommended a 100 to one ratio, but there were problems and this recommendation was discontinued and they went back to calling for 50 to one mixtures for these models.

One of the reasons they gave for their engines ability to operate on 100 to one, was they claimed their machining tolerances were so good that they produced less friction and so, could be operated with cleaner fuel/oil mixtures.

Since your's is an '87, and is well worn in, a 50 to one ratio can't do any harm, nor will it foul your plugs.

I'd definitely go with 50 to one to be safe.

I hope this helps.

Mark, Silver Girl 1983 fin keel/tall rig.

Edited by - oldsalt on 05/16/2003 21:20:29

Edited by - oldsalt on 05/16/2003 21:21:33

Edited by - oldsalt on 05/16/2003 21:44:54

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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 05/16/2003 : 21:13:34

My old motor, a 1980 Johnson 9.9, ran at 50:1.

<img src="http://www.catalina25-250.org/c25sm.gif" border=0>Don Lucier<img src="http://www.catalina25-250.org/c25sm.gif" border=0>
<img src="http://im1.shutterfly.com/procserv/47b2d904b3127cce9f7cd9ffdf1d0000003010" border=0>
North Star SR/FK

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Ben - FL
Admiral

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880 Posts

Response Posted - 05/16/2003 : 22:06:55

I just ran my Johnson Sailmaster 8hp to Bimini and back with out a lick of trouble. Put new plugs and lower end lube in it was all. Always starts second or third pull. Always use 50:1. That's 16 oz. per 6 gallon tank. I keep an extra six gallon fuel can onboard. When the fuel tank runs low I transfer it from the extra can. Then when it is empty I mix up the gas and oil in it.

Safe voyages,
Ben, FL s/v Chick-a-pea C250wk
<img src="http://www.members.aol.com:/benraye/pictures/fullsail.jpg" border=0>

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Ben
Master Marine Consultant

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USA
1234 Posts

Response Posted - 05/16/2003 : 23:26:36

Thanks everyone. I really appreciate it.

If anyone happens to have a copy of the manual, and they wouldn't mind loaning it to me to copy, I would return it within a day or so. Or I could send a check for you to run a copy off on the Xerox.

Thanks again,

Ben
Adventurous
#5553
C25 SR/SK

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billob
Deckhand

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15 Posts

Response Posted - 05/19/2003 : 16:27:44

I have a 1982 Johnson Sailmaster (7.5 HP) that came with a C25 I just bought. The boat was always in fresh water as far as I know (lake Murray in South carolina). I replaced the motor with a new Nissan 8 HP and am willing to sell the Johnson if anyone is interested. Motor runs - I have it on a stand and can demo with a start-up.
I'm asking $125 or best offer. E-mail me at "billob@bellsouth.net".
I am located in Mount PLeasant SC (near Charleston).
Bill O'Brien

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