1976 Mercury 650

[tallcanadian]

Hi All. I just purchased a near immaculate tri hull with a '76 Merc 650 on it. I'm picking it up on the weekend. I've not heard this run but the owner tells me it likely needs a carb kit, which I expected. However, is there anything I should be aware of with this 3 cylinder outboard? Any know issues or concerns? It seems I remember something back in the day that one of the cylinders on these triple cylinders use to burn out..Any truth to this? Any help is would be much appreciated.

IMG_0206.JPG

[tallcanadian]

Okay, so it turns out that my outboard is broke. Two cylinders are putting out 110 lbs compression and it idles very rough. I'm told that I may have 2 cylinders scored. Now, what are my options? Scrap it, try to find parts? I need you Mercury guru's to give me some advice. All opinions will be appreciated.

[aussieflash]

110 is ok.Whats the 3rd cylinder read?

[tallcanadian]

The three cylinders are 100, 110, 135. It idles rough. The previous owner told me that he would have to ease into the throttle to get it to run decent. I figured it needed a carb kit.

[oldman570]

Sounds to be tear down time to see just how bad the pistons and cylenders are before spending any $$$. Then you will have to make a choice, rebuild or scrap. Old mers .com on the net should have all the parts to rebuild it if not here on Iboats.
Best of Boating, Oldman570