Re: [OMC-Boats] 1970 Evinrude Sportsman 155

From: Lee Shuster <lee.k.shuster@...>
Date: Tue, 5 May 2009 12:26:54 -0600

This is an interesting topic. I can't resist (politely) offering a differing point of view, Greg.

Personally I have never seen or heard of a case of a OMC/MerCruiser/Volvo GM Marine engine built before 1973-75 (when hardened valve seats became standard) that suffered from valve seat recession due to running on lead-free fuel. Usually pre-ignition or pinging is not a problem, either; assuming the engine is running stock ignition timing and your cooling system is working properly.

I WOULD run middle-grade (88-89) or premium-grade (90-91) octane fuel when it is conveniently available, but I wouldn't worry about additives or the occasional tankful of REGULAR (87) grade gasoline.

Using STA-BIL or SEA-FOAM is a good idea to prevent stagnant varnish build-up over long storage periods, but the idea that you should worry about valve lubrication for non-hardened valve seats is sorta like the warnings we got about Y2K. (I have used such additives on vintage air-cooled motorcycles, with good results, but I don't find it necessary on boats.)

Also, I am concerned about the adverse health affects to yourself and the environment that some fuel additives may have.

Tell you what, just send your fuel additive money to me or better yet donate to Phil's website!

Lee Shuster

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From: omc-boats-bounces@... [mailto:omc-boats-bounces@...ultimate.com] On Behalf Of Gregory B. Fell
Sent: Tuesday, May 05, 2009 9:51 AM
To: Evinrude & Johnson Boats of the 1960's and 70's
Subject: Re: [OMC-Boats] 1970 Evinrude Sportsman 155

You need to use lead substitute for lubrication. I also add octane booster.

Greg, '69 Sportsman 155

Gregory B. Fell
The Fell Law Firm
3300 Oak Lawn Avenue, Suite 700
Dallas, Texas 75219
PHN: 972-488-8177
FAX: 214-219-4218
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William R. Lindow, DMD wrote:
Hello to all,

I have recently purchased a 1970 Evinrude Sportsman 155 which appears to be in very good condition. I will have many questions and some of them are fairly basic but the first one is refueling the boat. It used to run on leaded and is unleaded safe for it and there appears to be two different places to refuel- one in the bow and one in the stern. The boat is running well at this time and appears that it only had one owner.
Thanks,

Bill
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Received on Tuesday, 5 May 2009

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