Re: a couple of mercury dinosaurs
Hi Mred,<br /> Your motors are indeed classics of the best kind, although I'd choose the Mark 30 over the Mark 10 for general use. Both of your motors check in in the 1957/1958 era. Mercury numbered their serials sequentially, so the 1064894 is the 1064894th Mercury made, and so forth. However, they were very picky about letting serial number information get out to the public, and were known to "skip" blocks of number to make it seem like there were more being built than there actually were. You'd have to understand their founder, Elmer Carl Kiekhaefer to know why. <br /><br />Back to the motors. Get yourself a manual - the 1965 and prior Mercury manual is still available through Grubb's Marine at
www.oldmercs.com. It'll be the best $40.00 you can spend on your motors. The Mark 10 has an automatic transmission which when it worked, worked wonderfully, but made simple tasks, like changing a water pump impeller, very difficult. The Mark 30 had a powerhouse of a powerhead that loves to rev, but it's mated to the 20hp lower unit and there were some longevity issues there. It works fine, but won't take a ton of abuse. If it has a bronze prop on it, save it for show and find yourself an aluminum wheel for go. Prop it to spin about 5500 at WOT and you'll be good to go.<br /><br />Fuel pump kits, water pump impellers, carb kits, ignition components, timing belt, etc. are all available still. Working on the Mark 30 magneto might require a colorful vocabulary, as it's a bear to remove from the tower - but not impossible.<br /><br />Have fun!<br />- Scott