Doug Redinger
Seaman
- Joined
- May 22, 2005
- Messages
- 73
I bought an old 1973 Larson Bowrider 186 with a Mercruiser 888 sterndrive. I was curious what the total overall timing advance should be. The manual I have for it shows 10 degrees BTDC at idle for the initial timing , but I wondered what the total timing should be at cruise RPM or WOT RPM. It is showing about 32 - 34 degrees of advance at about 2400 rpm now, so I think the timing is about right.
A second question about this old motor and outdrive if I may?? There are 2 fairly heavy wires (about 12 gauge or so) going to the top of the outdrive or gimbal area from inside the engine compartment. One of them is purple and the other is light blue. They both have bullet connectors on the ends inside the engine compartment, but they are not connected to anything. I have a wiring diagram for this motor, but the schematic is not real clear as to what purpose they serve!! Perhaps a optional mercathode system or something??? Any Ideas???? The trim sender already works on this boat so I don't think it would be that. Besides you wouldn't really need a 12 gauge wire for a sender would you???
Thanks in advance for all responses
Doug
A second question about this old motor and outdrive if I may?? There are 2 fairly heavy wires (about 12 gauge or so) going to the top of the outdrive or gimbal area from inside the engine compartment. One of them is purple and the other is light blue. They both have bullet connectors on the ends inside the engine compartment, but they are not connected to anything. I have a wiring diagram for this motor, but the schematic is not real clear as to what purpose they serve!! Perhaps a optional mercathode system or something??? Any Ideas???? The trim sender already works on this boat so I don't think it would be that. Besides you wouldn't really need a 12 gauge wire for a sender would you???
Thanks in advance for all responses
Doug