toledobasser wrote:There is a difference between running on a hose with no resistance and running in the water. My dad had an old 90 Evinrude that would not idle for us. Once you got it past a fast idle it would run. Multiple trips to the “mechanic” and multiple times adjusting the timing, etc…..he would say it ran great on the hose and was fixed. Wed take it to the lake and have the same problem.This has very little to do with your problem other than the fact that Im saying running on the hose and running in the water are different.I would be willing to bet that the idle exhaust passage in the mid-section is plugged. When running on a hose there is no water in the mid-section so the low speed exhaust (low pressure exhaust) can vent through the prop, the way it does at speed. At idle in the water, the mid-section is full of water so if that exhaust bypass is plugged there is nowhere for the exhaust to go, hence the idle issue. Thanks to my OMC instructor from 20 years ago for making us aware of this. I applied that knowledge soon thereafter to the great pleasure of my customer.
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