Re: Stus-List 3GMD engine blow back

I would rebuild this engine if: 1. you have a sense that the boat has been well maintained, namely the engine zinc has been routinely replaced. Yanmar added a small amount of nickel (or was it chromium?) to the cast iron for their marine blocks, this and the zincs, were seen as

Re: Stus-List 3GMD engine blow back

Original message From: DON JONSSON via CnC-List <cnc-list@cnc-list.com> Date: 9/27/17 5:34 PM (GMT-05:00) To: cnc-list@cnc-list.com Cc: DON JONSSON <dbjons...@shaw.ca> Subject: Stus-List 3GMD engine blow back Hi I continue to try and understand what is wrong with my en

Re: Stus-List 3GMD engine blow back

I had a season where my rings got stuck. Compression measured 155, 165, 425. The crankcase was so heavily pressurized that the dipstick blew out. Ultimately I was able to "unstick" the rings by putting penetrating oil (PB blaster) in the cylinders and hand rolling the engine daily for a week.

Re: Stus-List 3GMD engine blow back

Don, Just went through all of this same BS with a Yanmar 3GM30F that we installed in 1986. After 8,793 hours it was simply worn out and not worth the costs to rebuild an old motor. So, I bought a new Yanmar 3YM30AGE and we will install it next week. Hopefully the new Yanmar will give me (or the

Re: Stus-List 3GMD engine blow back

Check to see whether the oil leak is coming from your dipstick. If it's loose, that's probably the source. Alan Bergen On Wed, Sep 27, 2017 at 2:33 PM, DON JONSSON via CnC-List < cnc-list@cnc-list.com> wrote: > Hi > > I continue to try and understand what is wrong with my engine without >

Re: Stus-List 3GMD engine blow back

On Wed, Sep 27, 2017 at 4:56 PM Bill Dakin via CnC-List < cnc-list@cnc-list.com> wrote: > Sounds like rings to crankcase blow by to me. Does this engine have a > breather on the side of the crankcase? My IHC Cub engine, essentially an > Atomic 4, has this breather that before my restoration,

Re: Stus-List 3GMD engine blow back

Sounds like rings to crankcase blow by to me. Does this engine have a breather on the side of the crankcase? My IHC Cub engine, essentially an Atomic 4, has this breather that before my restoration, would emit blow by gasses. There is no other source of pressure to emit oil or gas. You could

Stus-List 3GMD engine blow back

Hi I continue to try and understand what is wrong with my engine without paying more good money. And I have started looking for a new motor. First the problem. The engine recently started to leak a fair amount of oil and to start poorly. We spent a lot of time trying to find exactly where

Re: Stus-List 3GMD

You didn't say where you're located. I, too, had a leak, and the new dipstick cured it. I got a new dipstick for my 3GMF from Cook Engines in Portland, OR. (503) 289-8466, or check with any Yanmar distributor. Alan Bergen 35Mk III Thirsty Rose City YC Portland, OR On Wed, Nov 2, 2016 at 2:09

Re: Stus-List 3GMD

Try J-Way enterprises in Scituate Mass..expert Yan market service and parts.I don't have the phone number right now, but they have a website site.Google. Ron C. Get Outlook for Android On Wed, Nov 2, 2016 at 6:24 PM -0400, "rshibe via CnC-List"

Re: Stus-List 3GMD

Howard, You might try and find a fat "O" ring or whittle down a wine cork. Ray Sent from my iPad > On Nov 2, 2016, at 17:09, Howard and Skippy via CnC-List > wrote: > > Hello All, > Now that the boat (35-3) is on the hard, I was able to clean the engine and > try to

Re: Stus-List 3GMD

Howard, You may want to review why there is pressure in the crank case pushing oil out. It may not be an issue, but if it has changed, it could be that you have piston ring issues allowing exhaust gas blow-by. Regards, Tim (ex35-3, but with a 3GM30F) > On Nov 2, 2016, at 5:09 PM, Howard and

Stus-List 3GMD

Hello All, Now that the boat (35-3) is on the hard, I was able to clean the engine and try to locate the source of my oil leak(s). It appears that the culprit is the dipstick! The rubber seal no longer is able to stay in place, rises up and allows oil out of the crankcase when under power.