Need Help to start Mercury 45 4cl.

[P1]

Hi i'm P1 new on this forum.I'm having big problems to start with my Mercury Classic 50 45 4cl every time i go out the motor stops.Last time i went out for fishing after 30 min runing i stop,when i try to start it didn't start with noting another boat have to get me in this is the fifth time.I have changed the trigger,stator,clean all fuel system,neutral switch is eliminated.Now i'm asking for some help before i try to change the switchbox.It seans that some times
there's are spark and some times no.

Thanks in advice and regards P1



Sorry for my english.

 

[coolguy147]

Re: Need Help to start Mercury 45 4cl.

kill switch

 

[P1]

Re: Need Help to start Mercury 45 4cl.

Thanks very much Coolguy147 it is already eliminated thats what i ment buy neutral switch the one at the control.Can it be a leak in fuel system but it seans that when i check the spark some times there is and some times not.

Thanks once again for your help
Regards P1

 

[AMD Rules]

Re: Need Help to start Mercury 45 4cl.

When it doesn't re-start, does it turn over and spin okay with the starter?

Is the fuel primer bulb firm, or is it possible the fuel is draining back to the tank when idle?

I your motor oil injected?

How are you checking for spark?

Can you borrow or purchase a DVA meter to check the ignition? Seems like you have bought quite a few parts already. Better to perform a test and determine which specific component is failed and perhaps save some money.

 

[P1]

Re: Need Help to start Mercury 45 4cl.

Hi and thanks very much for your help AMD RULES.It's spining very well strong but not start,primer bulb it's going empty after i stop.But befor i start i pump and it flood from carb and go out fuel.To check for spark i take off the plug one one and put then near the head and give a start.I check all the ignition step by step on manual with OEM Meter.

Thanks for your help and time
Regards P1 very worry



Sorry for my english i'n not so good.

 

[Grizzlybear]

Re: Need Help to start Mercury 45 4cl.

Is it a "classic fifty" liek mid 80s? Coz if it is, I have that exact same problem, If I run her for 30mins/hour, and stop, she is a pig to get started again. I have read all sorts of explanations, even read somewhere that the fuel evaporated in the carb, therefore it requires additional priming.

I got around it this way. When you stop, run the motor dry of fuel. Then prime just one single pump, (not till the ball is hard) then it should start up, be sparing with the choke.

I feel for you, it's a total pain! I always carry a spare set of plugs, and in desperate times have changed these over. Then it starts no problem. It as if the engine when warm keeps drawing fuel in after it has been stopped. Man it's annoying. I have noticed if I leave the fuel line connected it will actually compress the ball, which is proof if is "sucking" the fuel up, and possibly causing to flood.

 

[P1]

Re: Need Help to start Mercury 45 4cl.

Thanks very much for your help Grizzlybear yes it is classic fifty 80s.Now i buy new fuel and i an going to clean all fuel system once again.I am trying to do all that every one is telling me to try.

Thanks once again for your help Grizzlybear
Regards P1.

 

[coolguy147]

Re: Need Help to start Mercury 45 4cl.

i believe its flooding. i say check spark again and check ur needle and float and seat in the carb

 

[Grizzlybear]

Re: Need Help to start Mercury 45 4cl.

I would lay a fair amount of cash that it is flooding. Check the carb, give it a tap, make sure the float is returning. Whenever you stop running the motor when it is warm, and you intend to restart it, try disconnection the fuel line for that time. And do not prime it with the ball, just turn the key with the control box shifted in neutral to full throttle. Like I say, I feel for you. It's a pain.

And always carry those spare plugs, I know the cap is a pain to get on and off, but not as much as a pain as flagging someone down for a lift home.


Good luck. Let me know if you have sucsess, very interested to know.

 

[P1]

Re: Need Help to start Mercury 45 4cl.

Hi thanks very much to everyone now i am cleaning all fuel system and change all fuel pipe and next week i hope i give a try beause it is a little bit windy here.

Thanks very much once again all of you very helpfull people i will let you know.Regards P1 from MALTA.