NJFisherman
Cadet
- Joined
- Sep 11, 2005
- Messages
- 7
Hello all ad thanks for helping in advance. here is my problem:<br /><br />I have a 70 HP Chrysler, 1979, 700Skier Model, 709HAON that has run fairly well for many years. I have always taken good care of the engine as I inherited the boat and engine frommy late father-in-law and always considered it to be an honor to carry on with his equipment. Recently, we went on vacation and toward the end were out fishing on the water and the engine wouldn't start. We got it back tothe launch with the electric motor and brought it back to our cabibns and with the help of several knowledgeable friends and thru the standard tests determind that the coil and/or CD unit had gone bad. I bought a CDI electronics Coil and CD unit (the combined package) and replaced the original with them and started the engine up the next weekend with hose attached. It ran like a champ and we launched the boat. The boat them seemed to do something funny. It starts great and immediately and it only takes one pop from the starter motor to get it going. It moves fime at idle speed and slow speed, but as soon as I kick it and try to get up on plane, the engine shuts down, like someone has just hit a KILL switch. Restarting is no problem, it starts right up and does the same thing. I can go at least a couple miles at 5 mph or a little faster, but as soon as I try to open the throttle it does the same thing, it is like someone shuts the electrical down completely. It always starts right up afterward too. Fuel lines are good, bulb is always hard within reason and fuel pump diaphragm appears to be intact and uncompromised. We havent completely eliminated a fuel problem, but the way the engine cuts out ( like someone turned off the ignition) leads me to believe that the new CD unit isnt pulling its wieght at higher rpms. It appears that the shutoff occurs around 3-4000 rpms and varies, but is always in that area. We tried the old coil and CD unit in various combos with the new parts and the old ones are definitley bad. Like I said the engine, starts better than I have ever seen it in the past and the idle and slow speeds are running beautifully, barely a wisp of smoke, gas mix is good, cleaned the bowls, tried different tanks, etc.... If it was a fuel prob, I would expect it to sputter and die, not just go like someone turned off the key. Key switch appears to be intact and no corrosion or breaks. The only thin I havent checked is the throttle control unit at the drivers seat, but it would seem odd that it would choose to go at the same time the CD and coil went last week. Anyone seen this before?<br /><br />I have all the manuals, parts lists and original schematics and such, anyone think the aftermarketCD unit might be faulty and is shutting the engine down at a certain amount of current? I figure a coil is a coil, it either works or it doesnt. Please help, my wife and I are heading back to the lake this weekend and would like to take the necessary parts with us to fix the problem. I have not looked at the preamp and the light sensitive switch but wouldnt figure on that being the prob. I am pretty handy when it comes to working on the engine, but not an expert.
