Can anyone tell me a good paint match for this motor also, what year. Model WM7A #918214. I can't find any information on a number that high. It's the MK 25 powerhead I'm sure because of the thicker lower crank bearing plate. I found a MK25 carb and I'm going to machine the carb opening to match carb and reed block opening, does anyone know if this will cause a problem or should I leave it alone? I tore motor down and could still see crosshatch marks in cylinders, must have very little time on it. Lower unit is a KG7 if that helps with the year.
If you want to get an exact match and aren't too concerned about price, Peter McDowell in Canada sells the Wizard green. It is pricey and the delivery takes a while to get across the border, but it is supposed to be a perfect match and very durable paint (never heard a complaint about it). I don't think you need clear coat with it either. His website is www.nymarine.ca, and he has detailed instructions for preparation and application.
As far as a cheaper option, I have heard of guys using Duplicolor's Detroit Alpine Green on Wizards and Elgins, but I don't think it is a great match. If you have an auto paint store close by, they might be able to custom match it for you if you can bring in a flat surface for them to do the color match.
Again, if you don't mind the price, Peter's paint should be exactly what you are looking for.
An old "blue book" indicates a 1956 model.
Although, the crankshaft is the same as the Mark 25, the crankcase and center main bearing assembly (reed block) are different. The center main bearing assembly probably must be changed out to see any improvement. The improved flow into the reed block is likely wasted if it cannot flow out as well.
Thanks JB I've used Peter's paint before, It is very good paint, but ,took so long to get it I was out of the mood to paint. May try local NAPA see if they can match it. Dave.
Joe, Thanks for year info. I wasn't aware the reed block was different,what you say makes sense. Dave
Your Wizard WM7A, 918214 is a 1957 Model & was the last in the series of Mercury built Wizards.. The serial # range is 917751-922750 for a total of 4999 motors built. Yes, he is right, just enlarging the front end will not do much good without opening up everthing from there back, leave it alone unless you do everything. The lower unit is similar to a KG7 but should not have a splined prop shaft & clutch disc's as a KG7, if it does it IS a KG7 lower unit, at least the foot. The Wizard had a smooth prop shaft with a shear pin as original.
Thanks Ronald, I think I'll just rebuild carb and mag and repaint. I don't want to mess up a good motor. Lower unit has smooth shaft and pin. Dave
If you're gonna try to match the paint, look for a protected spot where the original paint has not faded. Under the tank rim is a good place to look.
JW in Dixie