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  1. #1

    Default Spark Plug Trouble

    I recently put a hydrofoil on my 15 Honda and I didn't put the anode back on, would that cause the both spark plugs to die?

  2. #2

    Default Re: Spark Plug Trouble

    I wouldn't think so, the anode is a sacrificial piece of material, so the rest of the engine does not begin to corrode.

  3. #3

    Default Re: Spark Plug Trouble

    Quote Originally Posted by eneusiis View Post
    I wouldn't think so, the anode is a sacrificial piece of material, so the rest of the engine does not begin to corrode.
    Yes, but I DIDN"T put it back on

  4. #4
    Join Date
    Sep 2008
    Location
    Hague, Virginia, USA
    Posts
    4,256

    Default Re: Spark Plug Trouble

    The anode has nothing to do with how the engine performs, at least in the short term. As eneusiis said, it's only function is to prevent corrosion of the outer engine parts by becoming the target of the corrosion. That's why it's called a sacrificial anode.
    CHawk 25 DLX

  5. #5

    Default Re: Spark Plug Trouble

    Ok, thanks for that info, any idea what the problem is?

  6. #6
    Join Date
    Feb 2018
    Location
    Michigan
    Posts
    111

    Default Re: Spark Plug Trouble

    We may need some more information in order to help. You mentioned that the spark plugs have “died”. Have you physically removed them and checked for spark at each cyclinder? If so what condition are the plugs in? I agree with the above comments regarding the hydrofoil (properly installed) will not affect how the engine runs. That being said it can and will improve performance but it’s not directly related to either the ignition nor the fuel system on the engine.

  7. #7

    Default Re: Spark Plug Trouble

    Sounds to me one or more wires got bumped and not connecting to the plugs

  8. #8

    Default Re: Spark Plug Trouble

    After I was towed in when the engine "died", I replaced the plugs, it started the first pull, but nothing before that.
    Quote Originally Posted by Mheltun View Post
    We may need some more information in order to help. You mentioned that the spark plugs have “died”. Have you physically removed them and checked for spark at each cyclinder? If so what condition are the plugs in? I agree with the above comments regarding the hydrofoil (properly installed) will not affect how the engine runs. That being said it can and will improve performance but it’s not directly related to either the ignition nor the fuel system on the engine.

  9. #9
    Join Date
    Apr 2016
    Location
    barnegat NJ
    Posts
    3,143

    Default Re: Spark Plug Trouble

    What was the condition of the plugs? Black with soot,wet,dry. Is engine running now?

  10. #10

    Default Re: Spark Plug Trouble

    The plugs look fine, no soot, a little wet when I took them out, but I think that was from trying to get it going. I had 2 spare plugs at home, put them in, engine started first pull. This is the second time this has happened within the last 2 years. Everyone I talk to has never heard of both plugs dying at once. Both times it happened, I had stopped to fish, when I pulled the cord to get it going, it made an offer to go, stopped, .then no spark, came home, put spares in, started right up. I bought the plugs at a Honda dealer. I am stumped and I don't trust the motor anymore.

  11. #11
    Join Date
    Apr 2016
    Location
    barnegat NJ
    Posts
    3,143

    Default Re: Spark Plug Trouble

    Have you performed an open air gap spark test when this issue arises?

  12. #12
    Join Date
    Mar 2009
    Location
    Cincinnati, OH USA
    Posts
    4,395

    Default Re: Spark Plug Trouble

    Not knowing what age the 15 hp is, I am going to assume it is a fairly current model.

    I am going out into left field for this thought.....it might not be spark plugs at all.

    One thing that could be happening, is that you are flooding the motor when you try to start it. Evidence....your plugs are wet. You put dry ones in and it starts....

    If you happen to twist the handle too many times when trying to start it might flood it. There may be other reasons also.

    Next time it fails to start, twist the throttle grip all the way to full throttle and hold it there when trying to start. If it is a manual start, do not pull the choke out all the way....maybe even push it in, as an experiment.

    Be ready to bring the throttle back down quickly, in case it does start.

    Just trying to think of something simple.

    Mike

  13. #13

    Default Re: Spark Plug Trouble

    Yes, no spark

  14. #14

    Default Re: Spark Plug Trouble

    Well, it's a 1998 with very little use. I don't think it's a fuel issue because the plugs have no spark, ever. I have to install new plugs for the engine to start, then, it works like a new motor. I've had the motor 3 years and this has happened twice. The motor has a safety feature that you can't twist the throttle all the way while it's in neutral and it won't start at all in gear. The plugs are not really wet, just a little. I've been asking around since it happened and one guy told me I may need a hotter plug.

  15. #15
    Join Date
    Mar 2009
    Location
    Cincinnati, OH USA
    Posts
    4,395

    Default Re: Spark Plug Trouble

    My guess of a newer model was wrong. Sorry for misleading.

    Your throttle sounds like it is functioning correctly.

    Although, to efficiently start these models, I have found to advance the throttle all the way to the stop to start the motor. Make sure that there is some movement of the carburetor lever when you advance it. Sometimes, when the carburetor is taken off , the throttle linkage does no get reconnected properly and the carburetor butterfly will not slightly open when the handle is advanced to the stop.

    The recommended plug is DR6HS.

    A little hotter plug is DR5HS. Usually, I will recommend this is the motor is used to idle around a lot. It may not be so good for high speed consistent operation.

    While we are on the thought of "heat". Is the motor getting to temperature? Temperature is supposed to get somewhere around 165 deg F. The motor may be running too cold.

    Mike

    One thing I forgot. You said that there is not spark...ever. How have you tested for spark? Did you know that both plugs have to be in the circuit and grounded for either to fire? They both fire at the same time.

  16. #16

    Default Re: Spark Plug Trouble

    Again, I don't think the problem is fuel, as I said, when I replace with new plugs, it's start's right up

  17. #17

    Default Re: Spark Plug Trouble

    Well, to all the people that tried to help, thanks, but I still have the problem.

  18. #18

    Default Re: Spark Plug Trouble

    Quote Originally Posted by olands57 View Post
    Again, I don't think the problem is fuel, as I said, when I replace with new plugs, it's start's right up
    If you put the old plugs back in will it start?

  19. #19

    Default Re: Spark Plug Trouble

    Wow, if it would start with the old plugs, I wouldn't have a problem

  20. #20

    Default Re: Spark Plug Trouble

    Quote Originally Posted by olands57 View Post
    Wow, if it would start with the old plugs, I wouldn't have a problem
    Have you tried putting the old plugs back in?

  21. #21

    Default Re: Spark Plug Trouble

    Yes, I have, there is no spark on the old plugs, both plugs died at the same time, this is the second time in as many years, both times I came home, put new plugs in and it starts right up

  22. #22
    Join Date
    Feb 2018
    Location
    Michigan
    Posts
    111

    Default Re: Spark Plug Trouble

    How do the old plugs look? (Black ,brown,white?). Itís possible your motor may be running rich and fouling the plugs. Possible the float may be partially stuck in the carb causing a flooding condition. Just trying to throw out some ideas here. Itís possible you have a fuel problem thatís causing the plugs to fail.

  23. #23

    Default Re: Spark Plug Trouble

    Well, again, I don't think it's a fuel problem because when I put new plugs in, it's starts right up. The old plugs are clean, no fouling. I found out that the plugs that I was was using are a hotter plug for slow speed DR5HS, so I'm going to try DR6HS (colder)

  24. #24
    Join Date
    Apr 2016
    Location
    barnegat NJ
    Posts
    3,143

    Default Re: Spark Plug Trouble

    If you change the plugs out and she starts,You have spark!!! you need to look elsewhere

  25. #25

    Default Re: Spark Plug Trouble

    Yes, I have spark because I put NEW!!!! plugs in.

  26. #26
    Join Date
    Nov 2009
    Location
    temecula, ca., usa
    Posts
    2,927

    Default Re: Spark Plug Trouble

    Well, maybe the colder running plugs will be the cure to your problem. I do have a suggestion though....take a spare set with you....don't leave them at home this time.

    Good luck.

  27. #27

    Default Re: Spark Plug Trouble

    I had spare plugs with me, but thanks for the obvious. That still doesn't help me with why both plugs are dying at once.

  28. #28
    Join Date
    Jul 2014
    Location
    Buffalo, NY
    Posts
    77

    Default Re: Spark Plug Trouble

    Post a picture of what the "old" plugs look like after you pull them. That may help out a great deal.

  29. #29
    Join Date
    Nov 2009
    Location
    temecula, ca., usa
    Posts
    2,927

    Default Re: Spark Plug Trouble

    So why did you say that you went home TWICE to put in new plugs?

    As far as "two plugs dying at once", I don't THINK that is what is happening. Could be...I've been wrong at least twice. If the cold plugs keep her reliably running then so be it.

    But, like others here have guessed, I think you may be flooding the cylinders with your re-start process.

    So, prove me wrong.

    Gday.

  30. #30

    Default Re: Spark Plug Trouble

    Quote Originally Posted by olands57 View Post
    I had spare plugs with me, but thanks for the obvious. That still doesn't help me with why both plugs are dying at once.
    I think you're the only one that thinks both plugs are dying at once. Plugs rarely go bad. But anything is possible I guess.
    Also, just so you know. You're coming across as a jerk.

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