Recent content by eric260

I felt compelled to update this for anyone who needed it. The issue was not an overheating ECM. I knew it was the ECM and that was my best guess since the “mechanic” mentioned above saw no issue when he hooked up computer. Well, I had another (real) mechanic hook it up as the problem was...

I don’t know their age. When I have the boat go in for service it will be on my list to have checked and possibly replaced.

As an update, this turned out to be the problem. When I popped the plugs underneath, buildup was solid pressed against plugs. You could run engine with plug out and no water came out. After spending time scraping around in there I got water flow out of the plug. Cleaned as much as I could get to...

Out of curiosity, why does the raw water cooled system gasket have a restrictor in one of the holes? Why not just have them both open? Just curious.

Do these need any kind of like plumbers tape on them when they go back in?

Great info, I will take a look at that

I was looking at barnacle buster, it says you can fill the engine cooling system and let it sit for 12 hours. Then flush it all out. The crud coming out wasn’t sand, I think the sand i sucked up may have scraped some buildup loose causing my clogs

I pulled the block drains and one flowed, the other didn’t. Poked around, started flowing. I let it continue to drain, and other side stopped. Poked around, got it to drain. I then ran the engine, and whenever one side stopped draining I would poke around and something would come out then it...

This 350 doesn’t seem to have an oil cooler. It has a power steering cooler, then fuel, then goes to distribution housing. I popped the hose at distribution housing to see what my pump flow was. It seems to be in parameter. 8 quarts in 15 seconds at 1000 rpm. So it doesn’t appear to be upstream...

So as I’m in there looking for petcocks, low and behold a spark plug wire was not on! WTF. Is it possible I’ve been doing cruises like that? If you remember my other thread, I said I had a lack of power. This is prob it. Now, can the affect the cooling? Wouldn’t think so. At boat now tinkering...

Kind of what I figured. As soon as I get the free hours I will start blowing water and scoping cooling lines. I’ll make sure to update. Thanks for all the help

Thank you. Just so make sure I get what you both are saying, I’d pull the blue plugs and then run the engine or flush out with a hose maybe? I don’t see reference to and petcocks on the block. Everything for winterizing engine (2003 350mpi) just references the blue plugs.

Yes, I am doing the test tomorrow. Can you be more specific on “removing petcocks and flush?” Everything I can find is about flushing the system with ear muffs if you were in salt water. Or point me to a good source? Thanks

What do you owed flush with? Are you talking like a power washer blowing down the line?

That makes sense for a couple reasons. The sensor that reads water pressure is in the power steering cooler. I know I have low water psi after having a guy put the computer on it. Assuming the garden hose I saw flowing when I changed impeller is good flow, nothing blocked in transom, and...