On 8/24/2015 2:27 PM, Keyser Söze wrote:
On 8/24/15 3:18 PM, Ryan P. wrote:
Hi All,

I have a 1971 40 HP Evinrude (model #40152B). I bought it used a few
years ago, and its actually been a great runner even though I admittedly
abuse it maintenance-wise. Damn thing starts up quicker and more
reliably than my '85 Merc...

Anyway, this year, its started "spitting" and "coughing" at low RPM's.
When throttled maybe 15% past idle, it sounds great. If the gas were
bad or the oil mixture not right, the RPM's would not matter, correct?

I've changed the plugs and poured some seafoam into the tank and ran
hard on the lake for a good afternoon, but neither seemed to help the
issue.

Any suggestions on what to do next?

Thanks,

Ryan


Dirty carbs, low speed carb needle adjustment?

The carb IS due to be cleaned, for sure. That's a project for when I
have time to learn on the fly. I was hoping that if it was carb problem
(that just developed) the SeaFoam would clear it up.

As for the needle, adjusting the needle doesn't effect the problem,
except as it relates to increasing the idle speed.