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Scott06 reacted to Fun Times's post in the thread Need help figuring out the year of my 3.0L Mercruiser Engine with Like.

0A617689 belongs to a MERCRUISER 140, model number 01402006 which makes it a 1986 year model...

Sep 25, 2025
Scott06 replied to the thread 2012 3.0L TKS runs great with muffs, but slow on lake....

usually the fuel line is 3/8" double flare like brake lines would think you can get a coupler and a short section of line cut in half &...

Sep 25, 2025
Scott06 replied to the thread 2012 3.0L TKS runs great with muffs, but slow on lake....

At this point I would test the fuel pressure on the water at the rpm where you feel like you are hitting the wall where it should be...

Sep 24, 2025
Scott06 replied to the thread 1997 Mercruiser 4.3 LX not running steady steady at idle or higher RPM's.

Yes the advance knob should compensate so the light hits on the tdc mark -say you want 8 deg BTDC set the knob to 8 should offset the...

Sep 24, 2025
Scott06 replied to the thread 28' Pontoon with 3.0 Mercruiser Prop.

Google prop slip calculator you put in pitch rpm and mph it compute % slip

Sep 24, 2025
Scott06 replied to the thread 2012 3.0L TKS runs great with muffs, but slow on lake....

I saw new fuel pump but was fuel pump pressure measured under load ? my other hobby is old cars - its a chronic issue with mechanical...

Sep 23, 2025
Scott06 replied to the thread Stupid me, no oil.

I think I had to buy longer ones and cut them down a 1/4" or so When I bought it a few years back it was about $100 stainless is the...

Sep 23, 2025
Scott06 replied to the thread Stupid me, no oil.

Ill have to check mine out this year. I'm in fresh but I would have expected it to hold up better

Sep 23, 2025
Scott06 replied to the thread Carb tuning.

yes some of the factory webber carbs used 3 step metering rods not sure which engines etc but there were a few. Can only think it shows...

Sep 23, 2025
Scott06 replied to the thread 2012 3.0L TKS runs great with muffs, but slow on lake....

I used simple green in an u on my friends holley off his Volvo penta , cleaned it and didn’t strip the finish. Simple green is what...

Sep 22, 2025
Scott06 replied to the thread 2012 3.0L TKS runs great with muffs, but slow on lake....

the idle mix screws wont make any difference how it runs at higher rpm , just indicative that something was off if it ran best that many...

Sep 22, 2025
Scott06 replied to the thread Carb tuning.

there have been a few threads - I think in this one two guys ended up wit the same tune on a vortec 4.3 ...

Sep 22, 2025
Scott06 replied to the thread 2012 3.0L TKS runs great with muffs, but slow on lake....

Correct no points or condenser in a delco est. If you are getting a good spark that jumps 1/4" gap or so then no the coil is not the...

Sep 22, 2025
Scott06 replied to the thread Help with early 80s mercruiser 140hp.

Id start with a few basics use a spark gap tester to make sure your spark can jump a 1/4” gap or more. If the fuel pump was over flowing...

Sep 21, 2025
Scott06 replied to the thread Loud Rattle On Startup.

is the starter gear retracting or getting hung up? Any rocks or debris in the pump or trapped in the nozzle?

Sep 19, 2025

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