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Equipment & Gear => Power Equipment & RV => Topic started by: Jamieb on December 11, 2021, 07:23:01 PM

Title: Outboard question
Post by: Jamieb on December 11, 2021, 07:23:01 PM: I've got a 2007 4HP Yamaha kicker that has less then 50hours of run time on it. It will start fine and run great for about a half hour, then dies and wont restart. Pull the spark plug and its covered in oil. Clean the plug and it starts, runs good for about a half hour, and the plug is covered in oil again. What do you guys think? I'm not a mechanic by any stretch but I think that oil is getting past the rings.

Thanks
Jamie
Title: Re: Outboard question
Post by: MADMAX on December 11, 2021, 08:42:22 PM: 2 stroke ?
Title: Re: Outboard question
Post by: Stein on December 11, 2021, 10:53:28 PM: I believe the 2007 was a 4-stroke, I had one about that same vintage. If you are sure it's oil, sounds like rings are the most likely culprit.
Title: Re: Outboard question
Post by: BD1 on December 11, 2021, 11:19:55 PM: :yeah:
Title: Re: Outboard question
Post by: huntnphool on December 11, 2021, 11:36:27 PM: May not be oil but fuel. When was the last time you checked the T-stat? If it’s frozen open then the engine will never get up to proper running temp and could be your issue.

If you have never changed the T-stat, I’d start with checking that. :twocents:
Title: Re: Outboard question
Post by: HntnFsh on December 12, 2021, 06:24:55 AM: Good Advice!
Title: Re: Outboard question
Post by: fishngamereaper on December 12, 2021, 07:37:40 AM: I'll add how's it been stored...
On it's side or full trim up will cause oil to seep over time.
Title: Re: Outboard question
Post by: BigGoonTuna on December 12, 2021, 07:57:09 AM: Could be ignition related too. Is the engine still hot when you're having difficulty restarting it? At the very least, I'd change the plug out and see if it still happens. You could put a spark tester on the plug wire and see if it's a problem with the coil as well.
Title: Re: Outboard question
Post by: mtnwkr on December 12, 2021, 08:08:02 AM: Vent open on your fuel tank?
Title: Re: Outboard question
Post by: Jamieb on December 12, 2021, 03:18:55 PM: it is a 4 stroke and I'm sure its oil thats getting on the plug. The motor has been stored laying on its side. as far as the T-stat, its original. I havent changed anything on the motor, even the spark plug is original. The gas tank is mounted on the top of the motor and the vent in the cap works.
Title: Re: Outboard question
Post by: millerwheeler on December 12, 2021, 03:26:34 PM: Quote from: Jamieb on December 12, 2021, 03:18:55 PM
it is a 4 stroke and I'm sure its oil thats getting on the plug. The motor has been stored laying on its side. as far as the T-stat, its original. I havent changed anything on the motor, even the spark plug is original. The gas tank is mounted on the top of the motor and the vent in the cap works.

I totally agree
Been here with this same Situation
Title: Re: Outboard question
Post by: HntnFsh on December 12, 2021, 07:29:25 PM: Quote from: Jamieb on December 12, 2021, 03:18:55 PM
it is a 4 stroke and I'm sure its oil thats getting on the plug. The motor has been stored laying on its side. as far as the T-stat, its original. I havent changed anything on the motor, even the spark plug is original. The gas tank is mounted on the top of the motor and the vent in the cap works.

They have to be laying on a certain side or oil will leak by.
Title: Re: Outboard question
Post by: Kc_Kracker on February 02, 2022, 08:37:39 AM: @jamie im also in lacey, im an outboard tech i work from home. no matter how it was laid it should just burn off ads long as the cylinder didnt fill up in which case it would not run at all. if you want i cant look at it, it should be compression tested. could be rings, could be leaking head gasket on the oil galley.