90hp merc slight bogging

[triton75]

I have a 2005 2-stroke Mercury that bogs on take off just a bit... if you ease into it, she'll get on pad and scream. It does the same when loading on the trailer, once i'm on the bunks, if i give her any juice i have to really feather the throttle so it doesn't cut off. Any thoughts? Is this an idle adjustment? air/gas mixture? I just had carbs rebuilt last year by the dealer so, i'm hoping this is a slight tuning issue... thanks in advance. cheers!

 

[racerone]

Open low speed mixture needles 1/8th turn at a time and test run.----Likely the bog will go away.

 

[triton75]

Awesome! Thanks for the quick response here. I'm pretty un-educated in regards to boat engines. Any risk in changing the oil/gas mixture potentially causing internal engine damage?

 

[racerone]

??----I believe you misunderstand the concept of opening the low speed mixture needles.-----I can not believe the lack of understanding in how 2 stroke engines operate.-----Opening the low speed mixture needles does not increase the risk of engine damage in any way.

 

[triton75]

wow... i'm just asking a question here dude. I'm pretty sure you weren't just born knowing all about 2 stroke engine operations were you? i'm not asking to be chastized for a 'lack of understanding'... maybe someone else who wants to be helpful could chime in.

 

[Chris1956]

Idle mixture needles only affect engine at RPMs of 1200 and less. Low RPM of engine needs special, richer mixture than high speed operation.

 

[triton75]

Thanks for the feedback Chris1956. I'm going to dig into it this evening, hopefully this weekend having a chance to test it out...