History on the engine.
1. Bought from Ebay, advertised as rebuilt power head, lower unit serviced and cabs ultrasonically cleaned. 20-30 minutes run time to tune carbs.
2. Received engine first of February. Shipped with front of engine face down.
3. Installed and fired up engine two weeks later. Tank of water had quite a bit of oil in it after shutting engine off, I figured it leaked from the lower unit during shipment seeing as how lower unit and tilt/trim reservoir is the only thing with any kind of oil on an outboard.
4. Noticed idle was a little low and bottom port side carb was dripping fuel, removed and repaired carb.
5. Reinstalled carb and idle still low. Also noticed port side plugs and head were not as hot as starboard side after idling for 10 minutes.
6. With help from you guys I did find that the shift switch was bad cutting spark to three cylinders.
7. Installed new shift switch, and it idled much better.
8. Took out on water for first time and after idling away from the dock I tried to power up in gear and could not get over 1,800 rpm.
9. Installed new spark plugs and did a complete link and sync per OMC manual using piston stop tool and in place of the OMC timing analyzer I used the Johnny Rude Easy Timer.
10. Took out on water again with same results, could not get over 1,800 rpm in gear under load.
I figure it may some other electrical circuit not allowing engine to rev. The engine starts easy and idles good just can't any rpm's out of it in gear under load. Don't know how long engine sat after PO tuned carbs after the power head rebuild, it has been suggested to me that maybe the carbs and manifold need cleaning if engine sat for a few months. I have not tried cleaning carbs and manifold as of yet.