Looking for electrical diagram-wiring- for 1989 Four Winns 251 Liberator with twin 350 chevys and OMC outdrives

Here I'll give the wire color code list and the schematic for 1989 OMC GM engines

OF COURSE...CHECK RUBBER BELLOWS AT OUTDRIVE FOR TEARS, RIPS, LEAKS...ETC. SOMETIMES HOWEVER, IT CAN BE A HOSE,LINE, CRACKED EXHAUST MANIFOLD (WHICH GENERALLY CIRCULATE AND EXPEL WATER) OR ANOTHER COMPONENT IN AND OR AROUND THE LOWER BILGE AREA!...CHECK CAREFULLY

How do you connect the electric choke on a 350 Chevy engine. I am using a Holley 650 4bbl carburetor

Is the rotor turning? Check your coil and condenser.
The OMC drive system uses Micro switches in the linkage. They switch when the throttle positions are correct. The Micros operate the ignition Module.

Some of the outdrive systems have a starter cutout and some have an ignition cutout for the UP positon of the outdrive. The angle of the outdrive is too severe for the U-joints to move so they fix your boat not to start when the outdrive is UP.

Move your outdrive down and see if the igniton comes back.

check any chiltons manuel its in the back of the book under electrical

Yes, the ignition switch or ignition wires on the Run side of the switch may be bad. Most people don't know that the Start side of the switch can power the spark plugs. But when you stop cranking and let the key go to Run you can lose the spark to the plugs

There is also a safety feature in the OMC system. The micro switches on the linkage have to be adjusted or timed. This is so the throttle is not set too high to engage the outdrive. So it does a lockout of the module or a lockout of the starter.

A second feature prevents starting if the outdrive is up too high. This prevents breaking Ujoints and dangerous planing conditions from an improperly trimmed outdrive. Lower the outdrive.

You will see the microswitches, see if the linkage can be moved to line up the contacts. They are simply contact switches and you may have to temporarily disconnect some linkage to test start.

we had replaced the engine in our 87 4.3 star craft and when we put the omc cobra stern drive back in we now dont have foward gear, we have nuetral and reverse. could it be the linkage or could it be the shifter cable or any other idea's that could be the problem.

You should have slots on either side of the lowest part of the outdrive, above the skag or fin. There can be a difference if you have what is called a closed cooling system. The closed system has a radiator in front of the engine like an auto. The water from the lake goes through heat exchangers and does not make direct contact with the water in the radiator. The older open system uses lake water directly and it goes through the slots on the lower unit.