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ESGWheel replied to the thread Mercruiser 4.3L - Stumbles at 3000RPM.

With the carb'ed engine i assumed. So yes those can go. Need pressure gauge.

May 6, 2025
ESGWheel replied to the thread Rough idle and dies when put in gear.

Agree tough to believe in coincidences. One possibility is the dist cap got smacked and has a crack causing it to intermittently short...

May 6, 2025
ESGWheel replied to the thread Mercruiser 4.3L - Stumbles at 3000RPM.

No water > good. And yes the correct process. I was going with it only stubbles underway and only at 3k and only occasionally which was...

May 6, 2025
ESGWheel replied to the thread Mercruiser 4.3L - Stumbles at 3000RPM.

Well that does change things. Was this on the muffs or in the water and underway (i.e. under a load)? Do you own a fuel pressure gauge...

May 6, 2025
ESGWheel replied to the thread Mercruiser 4.3L - Stumbles at 3000RPM.

Forgot to mention > the plugs look fine.

May 6, 2025
ESGWheel replied to the thread Mercruiser 4.3L - Stumbles at 3000RPM.

I would think that water in fuel would cause stumbling at any / various RPMs, no? Since only at 3k and intermittent is why I came out...

May 6, 2025
ESGWheel replied to the thread Mercruiser 4.3L - Stumbles at 3000RPM.

Checking / replacing filters should be part of yearly maintenance including this one If this filter was clogged you would have issues...

May 6, 2025
ESGWheel replied to the thread Rough idle and dies when put in gear.

And the other questions please incl bondo’s Thx

May 6, 2025
ESGWheel replied to the thread Rough idle and dies when put in gear.

From the limited info it sounds like you are occasionally running on less than 8 cylinders which could easily be ign. related (example...

May 6, 2025
ESGWheel replied to the thread Mercruiser 4.3L - Stumbles at 3000RPM.

In addition to the above something else to consider is making sure the entire air pathway is clear and free to flow. Here is the...
May 6, 2025
ESGWheel replied to the thread previously posted about intake manifold backfire in my 1996 Volvo Penta 5.8L ford 351 Winsor. Having a complete engine rebuilt. Heads rebuilt twice..

It requires a tool (about $100, link) and an air compressor. If you do not have a compressor would be best to take it somewhere to do...

May 6, 2025
ESGWheel replied to the thread Starter Not Engaging.

I get what you are hoping for, but I can only offer a logical troubleshooting guide. While new ensure the battery is fully charged...
May 6, 2025
ESGWheel replied to the thread Mercruiser 120 poor starting.

The test he conducted was to look for a squirt of the accelerator pump post cranking the engine, and he saw none. Hence the next step of...

May 5, 2025
ESGWheel replied to the thread Mercruiser 120 poor starting.

Boy I am exercising my memory cells now. The Power Piston No. 33 in the picture is meant to be ‘floating’ and not locked in. It’s a...

May 5, 2025
ESGWheel replied to the thread Mercruiser 120 poor starting.

Great! You are getting gas to the carb! But looks like the carb is not filling up. The fuel level seems too low. See my blown-up...
May 5, 2025

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