Mariner 8HP bogging down issue

[TheUnderdog88]

So I'm not sure on the year, and I didn't get a chance to check out the serial number today, but I have a 8hp Mariner that runs great while idling, and will respond to throttle up until about 50% throttle, then stutters and dies. I replaced the fuel (brand new fuel, mixed 50:1 per manual), spark plugs, and took off the carb and cleaned it. Not much in there to speak of. Blew out the jets, ran fishing line through them, etc. I put the engine back on the boat, and it would idle, but bog down as soon as I gave it throttle. Started messing with the idle mix screw, and was able to get it to respond to throttle til about 50% without dying, but I can't give it any more. Any suggestions? I have a sneaking suspicion it's probably getting too much gas, and therefor it's probably float heights. I'll find out the S/N tomorrow and check the proper manual for float heights, as I only have the owners manual at the moment, not the maintenance one. Just wanted some confirmation that it probably is float heights before I go and take the carb off again.

Cheers!

 

[ondarvr]

Re: Mariner 8HP bogging down issue

If it's getting too much fuel it will start to run ragged and smoke, if it's too lean it will typically run smooth, but slow down and lose power.

Normally in this situation it's from being too lean.