Thanks for the extra replies, guys. The tach is an aftermarket generic one- and unsure of the settings (I followed the directions for the set-up). I replaced all the gauges when I replaced the stringers/transom/floor, and changed nothing on the motor. The rpms were the same as the factory tach prior to "disassembly" of the hull- so I'm fairly certain the setup is correct. The engine was performing exactly as it had prior to the restoration. Since the restoration, I replaced the fuel pump diaphragm. During the restoration, I put in a new tank and ALL fuel lines are new. There is no "sputtering" or missing while at WOT- I did a 15 mile trek yesterday from the cabin we rented back to the landing where we put-in.
I think I may have found another issue, though- and this may or may not cause it. I've performed the link and sync many times, and made sure that the "tickmark" on the cam was pointing at the roller on the throttle linkage. Hole-shot starts were adjusted day before yesterday by "tweaking" the low rpm screws so there is no hesitation nor bogging from idle to WOT. However, full throttle still leaves about 30 degrees on the butterflies, never getting close to fully horizontal. Perhaps I don't have the correct throttle cam on this thing? SO, this morning I re-adjusted it so that it has full travel by extending the linkage to the cam from the timing tower, and re-adjusting the roller so that when the throttle lever is in the upright (closed) position, the butterflies are as well. At full throttle setting, the butterflies are now in the full horizontal position. Timing is spot-on, so I wonder if the extra thirty degrees of deflection would have any bering on the low-rpm issue? Perhaps it's running too rich at WOT, with fully advanced spark, but restricted airflow?
Taking her back up to the lake to find out if this did ANYTHING... Will keep you guys posted.
