2001 m2 210 fuel primer issue

[javamon73]

I have a 2001 challenger 1800 m2 210. Engine will crank but not start. New spark plugs. I have fuel up to the fuel primer, but hoses dry after primer. Fuel filter seems clean enough to allow flow. I get no fuel when cranking. 3 amp fuse is good. Repair manual does not give me voltage or testing options for primer. Is there a way to test primer for proper operation or do i just replace it? Could something else cause the primer to not operate like bad switch box or bad safety switch? Seems like it works with starter?

 

[Dr Honda]

Yes... it's only on while cranking. Next to the fuse, there is a relay. It can be bad also. But if you put 12v directly to the pump... it should "Pump."

If it does: Then make sure the fuse, relay, and the connections are all good.

If it doesn't: Replace the pump .



With that said... I would also make sure the hose to the carbs is clear. (just blow into it) AND... if you want a back-up.... and/or a way to test things... then you can put a regular outboard primer bulb before the pump. That way you can manually prime the system.

 

[javamon73]

Thanks Dr. Honda, didn't want to put 12v to it until I got some advice, didn't want to damage it. Any idea on primer bulb part #? I'm thinking as long as it is big enough inlet/outlet for fuel hose it won't restrict flow? The bulbs I see for merc outboards have a 5/16 i.d. Will check size of line I have. Only options I see are 5/16 or 3/8 for generic bulbs.

 

[javamon73]

Whats wrong with this pic? Seems previous owner installed carbs in wrong order. Mid carb should be top with enrichment valve coming from top not mid carb. I have fuel flow to valve but not past. thinking i need to swap carbs and orient valve correctly. Valve bracket missing.

 

[Dr Honda]

Yep.......

I'd pop them off, and give them a good cleaning while you are in it.

As far as the primer bulb... the 5/16" generic will be fine.

 

[javamon73]

Ok, I installed the primer bulb and rearranged the carbs. Motor started right up (its alive!!!!) but backfires from starboard exhaust when I start it. Other than that it idles and revs without issue. Thinking carbs need to be adjusted or do i just need to run it in the water and it will work itself out? All 6 cylinders got warm. Only ran it for 10-15 seconds with no water. It was getting dark and didn't want to drag out the hose.

 

[Dr Honda]

I would put it in the water, to load the engine, before getting too crazy. But generally... these engines will run perfectly when the carbs are set to book spec.

 

[javamon73]

I put it in the water yesterday and had to drag it back in after 10 minutes. Glad I didn't go far. Engine died like it ran out of gas and would not restart. It would only go 10mph at full throttle. No more backfire though. I think it was just excess buildup of gas from trying to start it so many times.

 

[Dr Honda]

Look at the sparkplugs. If it's that wet... you will see it on the plugs.