Try 8 BTDC and see how it runs.
Ignition timing is set on a 1989 Acura Integra by setting the distributor to the appropriate angle. When set at the factory recommended angle the car will turn over with no problems.
This is a Bayliner, built in 1989, most likely a smaller bow rider/runabout.
4 degrees BTDC ON A 1990 1/2 Ton Truck With The SS-454 With A Throttle Body.
A 1989 Honda Accord has a timing belt.
125 HP per US coast guard label
Between 8 and 12 degrees before TDC... My 454 is set at 10 degrees BTDC and it runs great.
Timing Belt
TIMING BELT for the 2.7 liter V6 engine in a 1989 Acura Legend
Chain
it has timing marks on it, look!
In a 1989 Nissan Pulsar NX : The 1.6 litre four cylinder engine has a timing CHAIN The 1.8 litre four cylinder engine has a timing BELT
Emmisions sticker under hood should have timing setting try 8 before the wire is a single connector look in the plastic cover on top of firewall that holds wires going across it