Re: 1982 200HP versus 1985 185HP
Thank you for your reply! This forum is a great place for people to help each other. I really appriciate everyone here.<br /><br />The '82 powerhead was running very well at 3/4 open throttle when the motor died. I used to work for Mercury Marine's test facility in Florida, and had heard the 'seize noise' many times.<br /><br />After getting towed in, a compression test showed 0 psi for #2. Cyclinder #5 was already a low compression cylinder (80psi) when I purchased the boat. <br /><br />The wire for the high alarm siren was damaged, and I didn't know it. We found the thermostate melted on the starboard head and assumed the thermostat was the problem.<br /><br />I had replaced the water pump the week before, and we are sure that water was pumping fine at the time of failure.<br /><br />Do you believe that there could be some kind of blockage in the water chambers of the block?<br /><br />I ask because I plan to fix the '85 powerhead. Even though none of the cylinder show any damage, both thermostates are melted and much of the wiring is ruined, possibly by a small heat fire?<br /><br />Anyhow, money is tight and I was hoping to transfer the electrical systems and only have to buy two thermostat kits and some gaskets.<br /><br />But your comments lead me to believe that maybe the carb for #2 is fouled up leading to a lean condition. <br /><br />I'm not sure here, but thanks for any comments or suggestions!
