Spark plugs changed or not ?

I just went 29 years (about 600 hours) on the plugs in my 312. They were really in amazing condition and even Charlie (brady) couldn't believe it! The old plugs pulled were Champion F10's. These are non resistor plugs that haven't been made in quite a few years! I wonder if that has anything to do with it?? I ended up getting RF10C's. I'll see if they will last another 29 years. That of course is if I make it that long!!!

BTW, I changed them just because I was doing a tune up after 29 years!! The boat was really running pretty good. I did the tune up because I was detecting a slight WOT mis at GL this year.

If your boat is running, starting and the plugs look fine I'd leave them.

Pete do you get extra points at these old boat shows if you still have the original plugs and points?

lewy2001 wrote: Pete do you get extra points at these old boat shows if you still have the original plugs and points?

Mark,
On the serious side, anything original is a big plus but it's understood that maintenance items need to be changed. Interestingly some of the plugs are getting real hard to find. Just like the old woven cotton insulated wire is being reproduced, some of the more common old plugs are too but wow are they expensive. In my case having to go to a resistor plug is common. I need to do some research on it because adding resistance to the high tension side of the ignition has got to have some effect. When I rebuild my 4 in the Atom, I did put a new set of resistor wires on it and although it ran for years I never thought it ran the greatest. I ended up getting a universal set of plain wires from the tractor supply and it did make a difference - gained some WOT RPM! The original plugs aren't available anymore for the 4 ether but a replacement is. I'll need to get the old and new plug numbers and see what changed.