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Forum: Restorations & Upgrades

09-27-2021, 01:22 PM

Replies: 37

Mercruiser 7.4 Replacement/Upgrade

Views: 9,177

Posted By SB

Lol. More torque load is harder on parts,...

Lol.

More torque load is harder on parts, but it’s typically the drive that hates you more for that.

Lack of grease and misaligned drive shaft to coupler are biggest issues causing that.

Forum: Restorations & Upgrades

09-27-2021, 09:46 AM

Replies: 37

Mercruiser 7.4 Replacement/Upgrade

Views: 9,177

Posted By Unlimited jd

I remembered that 6 or so years ago I repowered a...

I remembered that 6 or so years ago I repowered a 260 sea ray with a 6.2 carb. It was a couple mph slower, and wanted to cruise at a slightly higher rpm. Seemed to run best 3800-4000 where the old...

Forum: General Q & A

08-03-2019, 06:16 PM

Replies: 81

Mercruiser 7.4L MPI slowing down

Views: 26,070

Posted By BillK

Personally I cannot imagine pouring cold water...

Personally I cannot imagine pouring cold water onto anything in an engine compartment, especially when it is hot. You should be able to find the Freeze It spray, that is what I would use.

Forum: General Q & A

08-03-2019, 07:07 AM

Replies: 81

Mercruiser 7.4L MPI slowing down

Views: 26,070

Posted By AllDodge

The ECM should be easy to see when the top cover...

The ECM should be easy to see when the top cover is removed. Pouring water on it won't short things out and there should be no issues but ONLY USE FRESH WATER.

Forum: General Q & A

07-29-2019, 08:04 PM

Replies: 81

Mercruiser 7.4L MPI slowing down

Views: 26,070

Posted By Griff

I'd find a new marine tech. The part # they gave...

I'd find a new marine tech. The part # they gave you is for the entire throttle body.
The TPS is clearly listed as a separate part https://www.mercruiserparts.com/bam/subassembly/31918/2705/100
...

Forum: General Q & A

07-29-2019, 06:27 PM

Replies: 81

Mercruiser 7.4L MPI slowing down

Views: 26,070

Posted By AllDodge

Need to find a Master Tech and have them look at...

Need to find a Master Tech and have them look at it. As to where they would be in your area, I don't know

As an example: gal has had problems with her VP diesels and many techs tried but failed to...

Forum: General Q & A

07-27-2019, 04:43 PM

Replies: 81

Mercruiser 7.4L MPI slowing down

Views: 26,070

Posted By AllDodge

As in post 4, at least the boat needs to be run...

As in post 4, at least the boat needs to be run with a pressure gauge installed to determine if its at least fuel pressure, otherwise were chasing ghost. A scanner watching the TPS and MAP would...

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