86 merc 120 HP flooding problem

[matt_rad73]

sorry if this was already answered a 100 times I did search quickly and didn't come up with any answers:

I just got a 86 grummen with a 120 merc strendrive. It ran for a while but now there is too much gas getting in the carb. There is a steel fuel line and a rubber hose and the gas coming from the rubber hose is flooding the motor. I had to squeeze that hose off to get off the lake last night. Is this a problem with the carb of fuel pump?

 

[JustJason]

Re: 86 merc 120 HP flooding problem

Is there a yellowish/clearish line that goes from the fuel pump to the carb separate from a steel line that is full of gas?????

If there is... replace the pump.

 

[matt_rad73]

Re: 86 merc 120 HP flooding problem

yes that is the hose i am talking about. a small maybe a 1/4 dia. clearish hose. Fuel is getting sprayed into the carb from that hose every rev and totally flooding the engine.

 

[JustJason]

Re: 86 merc 120 HP flooding problem

You need a new fuel pump. That line is a "telltale" (probably wrong word for it) to tell you that your fuel pumps diaphram has rupltured internally.

 

[matt_rad73]

Re: 86 merc 120 HP flooding problem

,
Thanks I actually already knee jerked to fuel pump but so many people were telling me carb, your floats are stuck and I couldn't accept that. I had my girlfreind pick it up from the store and theu gave her the wrong one. Now I have the old one off and hopefully they will have one the right one in stock

 

[matt_rad73]

Re: 86 merc 120 HP flooding problem

sweet thanks guys.

Now the parts store is telling me that the old sytle pump is no longer available does this sound right? the pump they gave me has a lever that is much shorter lever than the old one. is there a place online to get this pump.

it looks like this one:
http://www.iboats.com/mall/partfind...&gd_poid=112251&gd_row=6&**********=558740884


Thanks again!

 

[matt_rad73]

Re: 86 merc 120 HP flooding problem

i am told the old version of this pump is unavailable, is it hard to replace the diaphram?

also where is the serial number on the motor?

 

[JustJason]

Re: 86 merc 120 HP flooding problem

You need to find a new parts guy.....

Your pump is part # 26234A05 and it goes for $285, it is most certainly available.

You can substitute part # 32722 which runs for $88 bucks, but you may have to clock it to get the fuel line fittings to line up. That pump does not have a bellhousing for a fuel filter... but if your using a good fuel water seperating filter you don't really need it.

 

[Khaiboat]

89 Mecury 120 XR won fire!

89 Mecury 120 XR won fire!

I installed a rebuilt motor and had it ran for one hour at idle break in then I tried to accelerate but it failed at that moment. Now the machine won run, I unplug and check each spark plug look good, have spark, have gas but I won fire. Any one has any ideal how it won start? and anyone can give me a manual of this motor? thanks

 

[JustJason]

Re: 89 Mecury 120 XR won fire!

Re: 89 Mecury 120 XR won fire!

khaiboat please start your own thread with your own topic and don't add it on to somebody elses. Your questions will never get answered that way.

Welcome to iboats

 

[matt_rad73]

Re: 86 merc 120 HP flooding problem

Well I got the rebuild kit. It isn't too hard to do. The only road block I have found is getting the pin out that woulds the lever. Any ideas how to remove the pin. I have removed the brass cap that holds it in but I cannot seem to get the pin far enough out to grab it.
With the GF's help I got it out.
thanks everyone. Now I can try and start the boat again.