How to troubleshoot a Yamaha V8 Generation I Boat Engine: Part 2

Ryan Coffin, Lead Technician of Yarmouth Boat Yard, trouble shoots a Yamaha V8 Generation I boat engine. Salt water crystals or rust in manifold and cylinder head of an outboard engine is an indication of a water intrusion which can cause engine failure.
In this episode we show how to remove the manifold and check for any corrosion. If you have any questions, please feel free to contact us at Yarmouth Boat Yard, [phone].

[@johnroe3852]

You left us hanging, where’s part 3

[@Vikesh7896]

this engine is in the volvo s80 4.4 cbu, any problems i should look out for?
Sea water obviously not a problem to worry about in cars, however I have heard due to a design flaw of lacking proper drainage holes water can accumulate from washing rain etc & destroy the engine.

[@iiturregui]

I would like to understand why a cracked exhaust manifold would make the engine ingest water. I know it's a known issue on these Yamahas but I don't understand how it happens. Would you explain that?

[@kevingoodwin7450]

Raw water (ocean or lake) is circulated through the exhaust manifolds on most marine engines, if the manifold is cracked, when the engine is shut off the water will enter the exhaust portion of the manifold and right down into usualy at least one cylinder (typically the rear or lowest cylinder. It doesn't take long for salt water sitting in that cylinder before the cylinder wall gets destroyed. I've seen GM 350's with it so bad that after they were dissasembled the piston wouldn't move even with a 20lb sledge

[@officeofbrandon-carolinamo371]

Can you send a link to part 3 please

[@zamiz2893]

La primera generacion del 350 no fue buena.