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  1. P

    Combustion Problem?

    Ok so the latest is this, I took the carb apart and checked the ports and passage ways. Re assembled and using starter fluid it started and actually ran and when I gave it gas it accelerated. I think once the fluid was used up that's when it stalled. SO the good news is my compression and...
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    Combustion Problem?

    Hi Paul, I've looked at the blown up diagrams of this motor and can't detect the Compression release but I'm assuming it has one as you've said. I understand that pushing the starter button and letting the motor spin is not an accurate compression test. So I'm still not sure if compression is...
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    Combustion Problem?

    Hi. What is a compression release? Is it some kind of one way valve like a pressure relief valve? Another question i can't seem to answer or find on line is how do i know the timing is set correctly. Can't find service manuals online for this motor.
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    Combustion Problem?

    Ok so i was simply connecting the tester in the spark plug hole, then pushing the start button and the pressure slowly rose and topped off at 60 psi. In answer to the other question. I'm coming up with a way to get the fluid into the carb throat, because the air intake shape makes it hard...
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    Combustion Problem?

    Hello Raceone, I've been asked on this forum to check the compression. I thought this would tell me if rings are bad or valves not seating or maybe timing is off. Am I to understand in your opinion a compression test is not worth doing to diagnose my problem with this motor? I have spark...
  6. P

    Combustion Problem?

    I don't know. Maybe bad rings are there compression relief feature LOL. The motor is 2009.
  7. P

    Combustion Problem?

    Ok so i just tested the compression. 60PSI on each of the two cylinders. I'm sure that's not good. Does anyone have a spec or direction on how to determine if the timing is right. I have a dot on the cam gear, an arrow on the casting of the case and the flywheel has an indentation. All...
  8. P

    Combustion Problem?

    I think on this motor i have the old school choke. It's just a lever that opens or closes it.
  9. P

    Combustion Problem?

    Ok, wouldn't i at least get an initial startup? If the low speed circuit was clogged
  10. P

    Combustion Problem?

    I did get some starter fluid but very difficult to get it in the carb throat due to the design of the intake housing I would call it, but with what little it did get, it cranked and did not start but the starter solenoid released as though it wanted to start (dropped away from the flywheel ring...
  11. P

    05' Tohatsu 15 4 stroke. Starts and dies within seconds.

    Ok that's a possibility. After multiple cranks wouldn't the plugs have oil residue on them? They don't. How common would it be for the belt to skip a tooth or something and throw the timing off. Although the belt looks brand new and the teeth on the sprocket are all fine.
  12. P

    Combustion Problem?

    I carefully disassembled it. Cleaned all the passage ways and made sure the float and needle were working properly. I can see it injecting fuel into the throat when i move the throttle by hand with the carb on my bench. Could it be injecting fuel into the carburetor throat but still have...
  13. P

    Combustion Problem?

    In my original post, what tipped you off, that i need to clean it the third time?
  14. P

    Combustion Problem?

    Yes indeed. As you read my original post, I've done some troubleshooting. What might be missing?
  15. P

    Combustion Problem?

    Hello, I cleaned it once, then when i came to a dead end on spark problems i re visited the carb and cleaned it again. It looks like a brand new carb and is crystall clean.
  16. P

    Combustion Problem?

    Here's a picture. I see an arrow in the casting of the block and a dot on the cam gear. I lined that up with another mark on the flywheel. I don't have information on how to time it
  17. P

    Combustion Problem?

    It's new to me. I didn't think to check belt timing. This motor looks brand new and the belt looks brand new. Could it have jumped somehow?
  18. P

    Combustion Problem?

    2009 4Stroke 15hp. NSF 15C. Nissan I have spark. I have fuel out of the fuel pump i have fuel in the bowl of the carb. With the carb off, in my hand, with fuel in the bowl simulating throttle, i can see and hear the fuel being injected into the carb throat. Yet this motor will not fire...
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    05' Tohatsu 15 4 stroke. Starts and dies within seconds.

    I did check my oil level and it was ok. I did remove the new plugs to see what they looked like and the look brand new. Even after Mike cranks. This motor is electric start and the starter and flywheel are functioning fine. Are you saying oil can get past the rings and into the combustion...
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    Tried everything, except what's really wrong.

    I have no history with the engine, it's new to me. As for the carb, disassembled cleaned with carb cleaner, low pressure air to ports etc. I did not yet the CD. How can i do that. But there's a good spark jumping 8mm. Should that tell me that I have everything fine on the electrical ignition end?
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