Remove the plug from the bore, using a 13 mm socket. It only provides a path to earth to stop the ignition. There's nothing these 90 horsepower repair manuals doesn't cover. Island, The reading on the secondary of your new ignition coil seems more realistic, so are you looking for spark or trying to start the engine? I spoke with a guy yesterday that had me test the overheat alarm and realized I dont have the buzzer. I hate to take it out and get stranded. Have you made any of the measurements we've discussed here? Hello all, I have a 2 stroke Yamaha 90 that I just had the head rebuilt on because cylinder 1 had a hole in it.
Best price can be found at this website. Apparently it was 'running fine' when last used 11 months ago. Make sure you get the information you are looking for. The outboard marine mechanic should carefully read the text and become familiar with the 90 horsepower marine engine service manual procedures before beginning the work. Yamaha Outboard Wiring Yamaha Outboard Forums Yamaha Outboard Wiring Forum Topics. Hi wowhunter, Thanks for that info - After this mornings fruitless efforts I might well have to take a trip to Jcar! They will almost certainly be different from each other.
The other coils look plausible. Read it and understand it before mixing the Jaycar product. I tried cranking it up this morning with fresh fuel - no go. That impression Yamaha — Ngk Outboard Motor Spark Plug Guide over is usually labelled using: posted by wiringforums in September, 3 2017. Yamaha Outboard Wiring Diagram carwallps This is a image galleries about Yamaha Outboard Wiring Diagram. Disconnect the components from each other.
When I joined the two thermo coupler wires together at the engine, the light lights up. If you've got anything at all happening then they're probably alright. I also found an electrical diagram for my model. An hour or so later. From 90 horsepower maintenance procedures to complete 90 horsepower outboard engine overhaul, these 90 horsepower manual covers it all.
Please right click on the image and save the image. I've been probing around with the volt meter and think I may have a faulty coil. Jeff Zeb explains the mysterious workings of the ignition system on these motors in another post. Mercury-Mariner, Johnson-Evinrude, Yamaha, Honda, Suzuki Common Searches. A Fun Old Porcelain Sign and Ancient Tools Meet the MasterTech! Yamaha Outboard Schematics Wiring Diagrams Auto. This tests the low tension side of the coil. You can also find other images like wiring diagram, sensor location, fuel pump location, starter location, control module location, parts diagram, replacement parts, electrical diagram, repair manuals, engine diagram, engine scheme, wiring harness, fuse box, vacuum diagram, timing belt, timing chain, brakes diagram, transmission diagram, and engine problems.
Island, You could also disconnect the kill switch wire to eliminate the possibility of a faulty switch. The ignition coil should have a resistance of something like 1 to 10 ohms across the orange and black wires when disconnected from the circuit. Our techs only fix late models. Lift the cable from your battery, move it outside of the battery box and close the lid of the battery box. They can be deactivated as you wish.
Hold the side of the plug to the engine block. A first check out a circuit layout may be complicated, however if you can check out a metro map, you could check out schematics. I'd expect to see that 14V pulsing, which you could test with a 12V test lamp across Orange and Black, but given the coil resistance is so low, I think you've found your culprit. In an outboard motor, two things need watching: the temperature and the rpm. In other words it may be a single point failure in one half of the system, even though it won't run on the other cylinder. Since it had been really bogging down, I had cleaned the carbs a twice prior to realizing I should do a compression check. See how you go with that.
On the point of throwing a tantrum and chucking it over the fence - it would start. I will re-test again tomorrow and then chase up a used Ignition coil. Yamaha outboards are cooled by raw water, with a bypass valve that opens when the cylinder head reaches a preset temperature. You can remove the recoil start and use a drill and socket to test spin the motor with no plugs fitted. On an outboard, the temperature of the cylinder head needs to be monitored, not the temperature of the cooling water. Attachments yamaha 8cm 6g1 s 1985 3. After an old engine like this gets going, a good hard run is the best way to fix stuff before giving it a service.
Expect to see something around 1 to 10 ohms. Do not forget to share and love our reference to help further develop our website. A wiring diagram is a streamlined traditional photographic depiction of an electric circuit. You can also find other images like wiring diagram, parts diagram, replacement parts, electrical diagram, repair manuals, engine diagram, engine scheme, wiring harness, fuse box, vacuum diagram, timing belt, timing chain, brakes diagram, transmission diagram, and engine problems. I checked the compression and 1- 140, 2-130, 3-140. Close the plug gaps a bit to make it easier for the ignition to make a spark then start with all the usual checks for spark, petrol and air.