Honda cutting out.

[gss036]

Re: Honda cutting out.

Sure is flusterating. I was out again on Thursday, started great, ran about 15 minutes and the chug-chug-chug about 1/2 second. I tried the choke, no good, tried pumping the primer bulb, 2 spueeze and rock hard, no change. I went through this process about 5 times, then, it sped up for about 10 seconds, then chug-chug again. I was just about ready to move out into deep water in the channnel and pull the cowling to mess with the carb, then all of a sudden away it went and ran great for the next 6 hours. I stopped and started it several times during this 6 hour period. Got back into the harbor , flushed the engine, ran great. Friday, I pulled the carb and cleaned it good w/carb cleaner/air, reassempled and it ran great. It has to be fuel related. CDI just would not act that way.
I hope to get out fishing again next week. I try my best to get out at least once a week.

 

[lexi]

Re: Honda cutting out.

Thanks GSS. You could be right about it still being fuel related as a few dealers I know say this as well. Have shown a few motor mechanics the carb and they have cleaned it with me watching and they do the same as I am doing. I know Honda dealers have some special tools for probing jets. There are two tiny jets in the throttle Venturi. The carb cleaner comes shooting out of these.

I have a little Yamaha which had a failed ignition coil. Most guys told me that my intermittent fault with it would not be a coil as it would just go bang....................Not so. Coil resistance values read good but it would break down after a short time or long time then resume normally for a day.

I have also heard of CDI units doing this on a Suzuki but I may be wrong on this Honda of mine...............at ?165 I hope I am Don`t get me wrong, if I thought buying CDI would cure it I would get it tomorrow

Alex

 

[Harker]

Re: Honda cutting out.

Try heating up your electronics with a hair dryer and then testing them, or take your tester with you on the water and test immediately when problem happens. I've read a lot of posts about "good" tests when cold then when the parts warm up they act up. Good luck.

 

[lexi]

Re: Honda cutting out.

Tried it in the tank with heat gun. None of the components when heated would cause the failure. As Sods law would have it the engine ran beautifuly under load for hours. Have removed carb again. Took off all the plastic bits and boiled it in fresh water.....then compressed air and carb cleaner. Will try on water this week...... Only one new thought. My Silicon rectifier has been dud for a long while. Wonder if this would have any effect on circuitry. I know it only picks up from charge coil on flywheel but I think it goes in and out of CDI unit....Red Herring?

Alex

 

[gss036]

Re: Honda cutting out.

Lexi, had my motor out again today after cleaning the carb. After about 5 minutes, it went chug-chug about 5 times, started ruinning right and ran great about 4-5 hours until I sucked so ell grass or junk into the cooling system so cut my trip a couples hrs short. (I was able to blow it out w/strong water pressure at the washdown, back to normal water flow now) The good news was that one of our local Honda/Omc mechanics was at the dock working on an engine so I asked him about the problems you and I are having, he could not think of a solutation. He looked at my motor and adjusted the carb a little and looked at the small fuel filter and suggested changing it. He said even though I was running a seperate fuel/water seperator filter and drawing my gas from the main tank, that I sould still change it. He pointed out the discoloration of the plastic the filter was made from and said it needed changing.
Nothing to really help you w/your motor but something to read.

 

[lexi]

Re: Honda cutting out.

Thanks Gss. One thing I`m thinking about is the complete stalling of my motor. If one of my cylinder sparks went down instantly the motor would cut out.........as it does. If it comes back on then motor would start instantly......which it does. But on then going into gear it stalls. So would the spark on one cylinder stall again? Mmm .

On an engine that didn`t have lost spark ignition it would be easy to check the loss of one spark on a cylinder. These tiny stepped jets on carb that go from one end of the Venturi to the other could be the problem.......and then maybe not. The little filter has been changed on mine

Alex

 

[gss036]

Re: Honda cutting out.

Just an after thought. Check the wiring on the kill switch, maybe a frayed or loose wire/connection. If it is suspect, figure out where it connects to the ignition system and temporarly disable/isolate it to see if that makes a difference.
We may be chasing different ghosts.

 

[lexi]

Re: Honda cutting out.

Yeah .......disconnected neutral switch, lanyard switch and tiller stop switch..........same results.

Alex

 

[lexi]

Re: Honda cutting out.

I have stripped carb of all plastic and BOILED it. Cleaned it with compressed air and Toluene. Put my original ignition coil and pulser coil back on. Took motor onto Loch Lomond and it went great........for three hrs. It then done it`s thing of starting ok then stalling when put into forward. Funny thing is I had engine stopped in gear when I pulled the recoil one time.............it started and moved forward. It aint supposed to do that with neutral switch.
I could not get it to do it again. I will have a closer look at switch .

Alex

 

[lmddmc]

Re: Honda cutting out.

Ck the connector plug on fuel tank that plugs in to engine mine had a hairline
crack in it and was sucking air do not hook it to engine and pressure it up to ck for leaks, also if you have the orginal black metal plug the o ring get cracks in them and when they get moved around they suck air at times . when you talk about it only idling and no hi speed there is only 2 things that cause that garbage getting into jet at times or its sucking air . There is a lot more to that carb than what you have taken apart Really look for hidden jets behind slotted plugs
Mark

 

[lexi]

Re: Honda cutting out.

Thanks Mark
Have went over tank and connectors meticulously. Everything has been pressured with compressed air then submerged in a bath of petrol to check for bubbles. That same tank and connector is used on another two engines with no issues. Appreciate the problems with carb. I believe if something hard gets into those stepped jets it may be impossible to get it out. You are only able to clean and pressure the one way so if the carb cleaner cant dissolve it then it`s stuck.

Alex

 

[gss036]

Re: Honda cutting out.

I am going to try and get out tomorrow, so changed the fuel filter that was reccommended by the Honda Tech. Put it on the hose and fired it up, it started right up, "but" "chug" chug we go again, for about 45 seconds, then started running great. I pulled the plug wires one at a time and it did not go chug-chug, but obviouly running on 1 cylinder, but about 3 times faster than the chug-chug. It has to be in the carb, but how to fix it? I will se how it runs tomorrow if get out.

 

[lexi]

Re: Honda cutting out.

How were you able to pull the plug wire and have it run on one cylinder? Is it not a lost spark ignition? If I pull a plug lead the engine cuts out.

Alex

 

[gss036]

Re: Honda cutting out.

I just simply pulled one spark plug wire at a time leave the other one to run the engine. The engine misses, but continues to run on one cylinder firing. Put the wire back on and pulled the other, same result.

I was out today w/my boat and the engine ran good all day, did not miss a beat. Acutally I think it ran smoother than before since the carb was adjusted by some who kenw what they were doing. He was able to just look at the exhaust exits and tell that it was running too rich and leaned it out for me.

 

[lexi]

Re: Honda cutting out.

Maybe Honda 15hp does not have the lost spark system.

Alex

 

[gss036]

Re: Honda cutting out.

I really don't know? What is the lost spark system? Have you made any progress with your motor?
I thought after last week I had solved my problem, Not So. I was out again yesterday, started chugging again after about 15-20 minutes, ran good for about 5 minutes and started again, this for a couple-three minutes, cleared up and ran good for over 6 hours, stopped and started several times during the day.
I don't know what the next step would bw to fix it, if I get into town, may go by the Honda shop.

 

[lexi]

Re: Honda cutting out.

No progress GSS. There is a guy with EXACT same engine as mine. I hope to swop components with him............namely CDI and carb. The two wires running from neutral switch into CDI are showing very high resistance on meter compared with the WM data. they are about four times higher. As engine ALWAYS runs in neutral but only fails in gear i thought it could be linked.

I did bypass the switch by joining the wires together and it made no differerence. However you are still using the two wires with high resistance running into CDI if you see what I mean. Could be Red Herring. Honda do say in WM to replace CDI if resistance values do not meet the criteria. Maybe some of the dealers could tell us if they would just replace a customers Cdi if the values did not check out?
Your engine GSS. I had a coil go on a Yamaha which produced your symptoms. Swop out with someones ? Lost spark is when one side of the coil loses spark the other one will not work

Alex

 

[gss036]

Re: Honda cutting out.

Lexi, there is a post on the Yamaha forum about a 9.9 cutting in and out, the guy figured out it had a low oil cut out and he added oil and the motor ran fine. I know I have a little green light showing oil pressure, but I don't think there is a cut off switch involved?? I have a Honda generator which has a low oil cutoff. Any chance these Honda 9.9/15's have one??
Weather has been rotten here so have made out in 2 weeks. Last few days it is blowing 20-30mph and rain.

 

[lexi]

Re: Honda cutting out.

Don`t think mine has low oil cut out. Mine ALWAYS starts in neutral after cutting out. I am about a week away from getting that engine to try it`s components. Will keep you posted.

Alex

 

[JUSTINTIME]

Re: Honda cutting out.

have u tried running it without the cover on it yet?