Fuel additive for ’60 inboard?

usually it a lead additive for the valves, but if the engine has been re-built then you really don't need too.

Yes if the motor was rebuilt in the seventies then you might have issues, but if it was done within the last twenty years then it's not an issue or if the guy half assed it and didn't do the heads then ya you would have an issue.

This is not the first time this topic has came up on this site and it's the same BS scaring them into thinking they should do this and that when they don't oh well

do a search of the topic and I believe you will fine a very good reference manual or source that clearly states there isn't a need to use the crap, besides the lead by-product isn't very enviromentally friendly.

Koneill, There is no real substitute for lead so I would just use the boat and save your money. If a top end job wasn't done with all the good components then put them in when it's time to rebuild. The extra cost of the premium parts will come from all the money you've saved from buying the junk.

oooppps

Koneill, Mr. Gordon H. Millar, P.E. writes the feature article called the "Inboard Engineer" for Classic Boating magazine. Awhile back he devoted his whole feature (3pages) to the lead additives and just slammed it as being a real joke on the public. He went into the physics of engine construction differences as well as what the lead or lack of does. The lead was added to gas as a octane booster and not a lubricant. It was a interesting article that I would be happy to dig out, scan and email to you if you want more info. 79's idea of doing a search on the subject is good to but be carefull because you will read allot of "advertising". I have a 54 Atom, a 64 Dunphy and a 77 Tique and have never used the stuff. The 64 has never been touched mechanically, has about 2000 hrs. on it and still runs great with compression within the good range as well as no oil burning.(about 1 qt. per summer) The 54 and 77 were rebuilt but with all the "good stuff". I'm a active ACBS member and would say 90% of us are of the opinion that the lead substitute is a scam. The oil companies get enough of our money. Save it for when you need the rebuild as the stuff will not save it from the inevitable.

Koneill, You really don't have anything to worry about. The Gray 4-70 is build up (marinized) from the Continental industrial block. They were desiged for and used for lots of steady continuous work loads. The marinized version is actually de-tuned and listed at 70 HP at 3400 RPM so that really isn't pushing the engine. All the old engines were built to run on white gas which is straight run gas with no addatives at all including lead. It wasn't untill the early 60's that allot of marinas even started offering leaded gas at the gas piers. You can use the lead substitute without any harm but I really think you're just wasting money.