1976 mercury 7.5 stutters at full throttle

[Ryche]

I posted this topic yesterday but seems to have been deleted.. i've done a search on this topic but didn't find what i was looking for.. I have a 76 mercury outboard 7.5hp, that idles just fine, but when it's put under a load and you try and give it gas it just spurts and sputters and doesn't ever get to full throttle.. any suggestions would help.. i've checked the plugs and spark..

 

[Ryche]

Re: 1976 mercury 7.5 stutters at full throttle

TTT any one want to help me on this

 

[Fouled Plug]

Re: 1976 mercury 7.5 stutters at full throttle

What's your compression? Have you pulled the carb and cleaned it?

 

[JB]

Re: 1976 mercury 7.5 stutters at full throttle

Hi, Ryche.<br /><br />I don't remember your post, and I'm sure I didn't delete it.<br /><br />Your post is probably on page 3 by now. You can find it by scrolling to the bottom and clicking page 2, etc.<br /><br />The stuttering you describe is probably an over-rich condition usually called "four cycling".<br /><br />It could be from the high speed circuit being adjusted too rich, or it could be from a sticking float or needle in the carb.<br /><br />Good luck.