edgutgesell
Petty Officer 2nd Class
- Joined
- Jul 18, 2004
- Messages
- 144
Not a good start to this year. I have had a number of problems which has delayed the start of this season. One of the problems had to do with not knowing the correct year and model of my engine which caused receiving an incorrect oil controller and having to reorder to get the correct part. When I bought the boat 5 years ago, I thought I bought a 1987 Yamaha 150. I now know that it is pre-1985. I have the correct Yamaha shop manual for the engine. (150 ETXN) I ordered the manual several years ago from Yamaha using the 150 ETXN number.<br /><br />After installing the correct oil controller I attempted to start the engine and it would not start, and it did not not even kick once. Pulled the plugs and they looked wet with oil and gas as if there was no spark. I checked my shop manual to see how to troubleshoot this starting problem. I checked the resistance of the pulser coils, charge coils, and lighting coils as suggested. All of the resistances where within +- 20% with the exception of high speed charge coil. My manual said it should have a resistance of 127 ohms, however the resistance was alittle over 24 ohms. I decided to do a search here to see what the experts had to say about starting problems with early v6 engines. I found a thread topic "86 Yamaha 150 VPro" from an author named "quat" dated Nov. 25, 2004 that indicated that the high speed charge coil on his 1986 150 had a resistance of 24.2 ohms. That resistance was exactly the same as the resistance on the high speed charge coil on my engine.<br /><br />My question is: Is it possible that the stator on my engine is from a later Yamaha v6? My manual says if the resistances are not within 20% to replace the charge coils!! (stator)<br /><br />Another question I have is: rodbolt mentions in several other threads about a peak reading multimeter (Stevens CD 77) that is the only meter to have in troubleshooting CDI problems. I checked the price and it's pretty high!!! I have an ocilloscope. (Tektronics 335) Has anyone used a scope for checking these voltage readings? I am hoping that it will be a suitable substitute for the CD 77.<br /><br />In other threads there are kill switches mentioned that can cause no spark. I think that the start switch off position is a kill position. Are there other switches that can kill the ignition? I haven't tried disconnecting the white wire from the ignition controller to the CDI unit to see if it starts. That will be the week of the 4th because I won't be at the boat till then. (110 miles away!)<br /><br />Any information would be greatly appreciated!!!