I'm hoping some members may offer their thoughts on a minor issue. Everything seems right on my 1995 Mercury 90 OB and on 11/10/12, I gave it a through de-carb with the recommended 16 oz seafoam method & the plugs also came out like new.
I then sea trialed it for another 2 hours and it ran very well with one minor exception:
After running for at least 5 minutes under load in fixed RPM ranges from 3400 to WOT of 5500 RPM, when I eased back down to idle speed, I have a slight miss. The motor will jump to 1100 RPM down to 900 RPM with a slight shutter and a (pfffft) sound. What's strange to me, is this lasts for just less than 1 minute and the outboard settles back in at 1000 RPMs. I repeated this same thing 6 times so its consistent behavior. In my search for perfection, I'd like to solve this issue & appreciate your thoughts & suggestions.
Thanks,
reccrew
I then sea trialed it for another 2 hours and it ran very well with one minor exception:
After running for at least 5 minutes under load in fixed RPM ranges from 3400 to WOT of 5500 RPM, when I eased back down to idle speed, I have a slight miss. The motor will jump to 1100 RPM down to 900 RPM with a slight shutter and a (pfffft) sound. What's strange to me, is this lasts for just less than 1 minute and the outboard settles back in at 1000 RPMs. I repeated this same thing 6 times so its consistent behavior. In my search for perfection, I'd like to solve this issue & appreciate your thoughts & suggestions.
Thanks,
reccrew
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