Taking the advice from this forum, I purchased an OEM manual for my 1990 90 Hp Johnson VJ90TLESB. For the link and sync procedure, it says to use a test wheel. I've looked on the internet a little for a test wheel, but haven't had any luck.So, short of having a test wheel, how do I get 5000 RPM under load? Do I go 40 mph and adjust the timing, or should I strap my boat to the trailer and put it on the boat ramp with my engine intake covered? I've tried to adjust the timing at 5000 RPM with the engine out of gear (neutral), but I can never get to 28 deg BTDC. I can adjust it from 32 to 30. Even if I get to 28 deg BTDC, I'm at a no load condition. Has someone figured out what the adjustment is for the BTDC degree amount in neutral compared to under load? For example, 30 deg no load equals 28 degree under load?