Re: Blown Rod!!! 1954 evinrude fleetwin 7.5
Well, you may have to replace both the rods and the crank. Make sure you mic out the crank before you put it back to use. Truthfully, the old Fleetwin was a good motor, but the killer of it, was the users. All Fleetwins should not runn on anything less than 16:1 24:1 is okay, but only for a motor that idles more than WOT. A lot of good 5.5's and 3's have died the same way. Too many idiots who try to be boaters kill a lot of fine classics, unfortunately. Oddly enough, I have a 1970 4hp Lightwin here that I rebuilt for a guy (who hasn't paid me after 2 years) that got the crank and rods destroyed, by too lean of an oil mix. Ahhhh, it happens all the time. What I think is funny, is there are still a lot of old TD's still running out there, because the directions say to mix a 1/2 pint per gallon with the gas, but later they decided to say it was okay to run 50:1......even on motors that were built the same as the old TD's. What the Hell??
Oil is the cheapest and most important thing you can put in an outboard.