$txt['youtube'] = 'YouTube'; $txt['youtube_invalid'] = '#Invalid YouTube Link#'; Engine Servicing

Author Topic: Engine Servicing  (Read 4091 times)

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Offline rdper1

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Engine Servicing
« on: October 14, 2017, 05:49:42 PM »
Hi Guys(&girls)
Just took my newly aquired Mokai and engine into the authorised Honda dealer in Blenheim NZ for servicing and checking everything is all good.I gave it a run when I got it and it was running rough(almost as though the choke was not completely off)It wouldn't idle and was surging at full revs.The plug was black with carbon and also the exhaust and the inside of the engine cover was black with carbon.Just been into the workshop and after being worked on was not much better.Any idea's?

Offline Painlesstom

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Re: Engine Servicing
« Reply #1 on: October 14, 2017, 05:56:58 PM »
Take the air filter out, you don't need it on the water and it would get clogged from the exhaust deposits that didn't exit the hood due to the small vent hole. Cut another vent hole above the carburetor side so more air can vent. You should never run the engine at full throttle unless the boat is in the water. The surging at full throttle is the governor preventing it from over revving the engine. Let me know if that helps.
Tom

  >:D    

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Offline rdper1

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Re: Engine Servicing
« Reply #2 on: October 15, 2017, 02:35:52 AM »
Thanks for the info Tom.Had no air filter in and it was in the water.Engine was just sounding rough.I will cut a extra hole in the cover and was just trying to find an example on here to copy.Engine was left at the shop for them to have another go at getting it running better so will see this week.

Offline Painlesstom

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Re: Engine Servicing
« Reply #3 on: October 15, 2017, 08:04:29 AM »
Check the fuel connector to the gas tank, there is an o-ring seal on the connector. If that is damaged then the fuel pump would be sucking some gas along with air. Has caused mystery problems for others in the past, something else to check.
Tom

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Offline The Man

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Re: Engine Servicing
« Reply #4 on: October 15, 2017, 09:21:49 AM »
Thanks for the info Tom.Had no air filter in and it was in the water.Engine was just sounding rough.I will cut a extra hole in the cover and was just trying to find an example on here to copy.Engine was left at the shop for them to have another go at getting it running better so will see this week.

Welcome to the club Rob! We're all glad to have you here!  We are 14 shy of 1000 members, I have a feeling it will hit that number this week.
Cheers Mate!⚓

Offline rdper1

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Re: Engine Servicing
« Reply #5 on: October 15, 2017, 01:37:11 PM »
Cheers Tom.Will check

Offline Larry

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Re: Engine Servicing
« Reply #6 on: October 15, 2017, 01:49:19 PM »
Check the fuel connector to the gas tank, there is an o-ring seal on the connector. If that is damaged then the fuel pump would be sucking some gas along with air. Has caused mystery problems for others in the past, something else to check.
This was the problem I had with my Honda. Replaced the plastic connector and no more problems.

Offline rdper1

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  • Model Year: 2003
Re: Engine Servicing
« Reply #7 on: October 23, 2017, 05:33:35 PM »
Got motor back from the shop and it's running a lot better.

Offline Painlesstom

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Re: Engine Servicing
« Reply #8 on: October 23, 2017, 06:45:40 PM »
Glad to hear it. Let us know how it does on the water.  \./8
Tom

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Offline rdper1

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Re: Engine Servicing
« Reply #9 on: November 24, 2017, 10:18:41 PM »
Just an update on the engine Tom.Solved all the problems by using 95 octane petrol.Was using 91 previously.Going for a trip tomorrow to see how it does on the water and will use the geo tracker app.
Rob

Offline Painlesstom

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Re: Engine Servicing
« Reply #10 on: November 25, 2017, 12:48:24 PM »
Might have just been some bad gas, those engines were designed to run on 87 just fine. 95 burns slower and would actually decrease power a tiny bit. Glad it's running good now though, enjoy!  \./8
Tom

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Offline rdper1

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  • Model Year: 2003
Re: Engine Servicing
« Reply #11 on: December 27, 2017, 09:45:33 PM »
Hi Tom.Just back from Honda dealership and they say the GC190 has been replaced by the GX200 model.Presume that I can just transfer all relevant bits and pieces to new motor.
Would appreciate your input on this and whether I would be better to go down the Subaru road.
Cost of GX200 between NZ$900-1100.
Cheers
Rob

Offline CC-Coder

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Re: Engine Servicing
« Reply #12 on: December 27, 2017, 10:01:52 PM »
Hi Tom.Just back from Honda dealership and they say the GC190 has been replaced by the GX200 model.Presume that I can just transfer all relevant bits and pieces to new motor.
Would appreciate your input on this and whether I would be better to go down the Subaru road.
Cost of GX200 between NZ$900-1100.
Cheers
Rob

Hereís a good view of the Subaru with Tomís muffler if your interested.

https://youtu.be/LreIi9F_QaQ

And proof that it can take a lickin...
https://youtu.be/_FQcZhqhYOQ
« Last Edit: December 27, 2017, 10:07:06 PM by CC-Coder »
🤦🏼‍♂️ Chuck 🤷🏻‍♂️

Offline Painlesstom

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  • Model Year: 2003 / 2011 / 2015
Re: Engine Servicing
« Reply #13 on: December 27, 2017, 10:07:41 PM »
Hi Tom.Just back from Honda dealership and they say the GC190 has been replaced by the GX200 model.Presume that I can just transfer all relevant bits and pieces to new motor.
Would appreciate your input on this and whether I would be better to go down the Subaru road.
Cost of GX200 between NZ$900-1100.
Cheers
Rob

The GX200 is a completely different motor, nothing on it is compatible with the GC190. The muffler you have consists of two parts, the muffler and the outer heat shield with diverter. Do you need all of it or just the muffler?
Tom

  >:D    

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Offline Painlesstom

  • Painless Tom
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  • Posts: 5718
  • Age: 44
  • Location: Georgia
  • Cool Points: 55
  • Making Your Mokai... A Better Mokai!
    • Painless Products
  • Engine: EX21 w/17 head - ES
  • Model Year: 2003 / 2011 / 2015
Re: Engine Servicing
« Reply #14 on: December 27, 2017, 10:09:13 PM »
Hereís a good view of the Subaru with Tomís muffler if your interested.

https://youtu.be/LreIi9F_QaQ

And proof that it can take a lickin...
https://youtu.be/_FQcZhqhYOQ

I don't make mufflers for the Honda.  ;)
Tom

  >:D    

_________________________

www.PainlessClutch.com