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Mercury 65 hp no fuel

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Rip_jeff

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What's up everyone. Got a mercury 65 how motor. I had it running and it stalled out. I found out I'm not getting fuel. My question is about the fuel pump. I put new a diaphrams in. I have fuel all the way up till where I put the new diaphram , I put some gas in the carb and it fired right up. Here's where I put my new gasket and diaphram. The top one
 
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No I haven't jeff. Is there a way to test them. I got fuel all the way up to the pump. I took off a hose and poured some gas in the carb. It fires right up.
 
I checked them. One lets fuel in. One lets it out. Everything seems to be working there. Gas is flowing through there. It's not clogged. I'm attempting to blow out the carbs cause removing them means. The distributor and starter all have to be taken off.
 
I found if I pour fuel straight in the carbs. It fires with no hesitation. The carbs aren't leaking fuel at all. Perhaps one of the needles is clogged.
 
Rip_jeff said:
I found if I pour fuel straight in the carbs. It fires with no hesitation. The carbs aren't leaking fuel at all. Perhaps one of the needles is clogged.
Click to expand...

I jumped on this thread because I have a similar problem.

I have an old '69 Merc 650 that has sat for quite a few years. It always ran well. I want to sell the boat, so tried starting the motor. I mixed up a gallon of fresh gas and put it in the tank. First time it started, there was gas dripping from the (lower?) carb, so I shut it down. Next time, no gas dripping, but it won't stay running. Best I can get is about 5 seconds if I keep hitting the choke button. could the carbs be gummed up? Any simple way to fix this without taking everything apart?
 
fastjeff said:
In BOTH cases the carbs need rebuilding.

Jeff
Click to expand...

I feared that and it took me a couple weeks on-and-off to get to the carbs. It's a bitch of a job, requiring removal of the front plate, starter, coil and distributor. I didn't want to remove the distributor because I couldn't really figure out how to do it, or how to put it back without losing the timing. So, to get at the lower right carb flange nut, I had to buy a set of flex flare nut wrenches and grind away the lips on the 1/2" one so it would slide on the nut from the side. The carbs did have sticky varnish in them, but cleaning them was the easiest part of the job.

However, before putting everything back together, I disconnected the fuel line from one of the fuel pumps and tried pumping some gas through and got only fumes. I know the primer bulb was working and getting hard when I started this adventure, so I mixed up another gallon of gas in case I didn't have enough in the bottom of the tank, but still no go. That's when I noticed the pickup hose in the tank had disintegrated and broken into several pieces. That would certainly explain "no fuel". In fact, it's possible if I had been able to get good fuel delivery from the tank, the fresh gas might have flushed the brown soup through and I would not have had to touch the carbs.
 
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