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Old 04-29-2018, 10:23 AM
avorob avorob is offline
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Talking Engine overheated, operator's error

I left the engine water intake valve closed (after winterization) and ran the boat about a 1/4 mile before the smoke started coming from the engine compartment. The temp gauge was around 200 deg before I shot the engine down.

I had the boat towed to the dock after. There are pieces of fiberglass pocking from the exhausts. See the picture.

What do I need to check/do before I try to re-start the boat?

Feel free to use any adjectives with your advice. Not that it matters but I thought that it was the ballast system valve that I left closed. I noticed the smoke right away thinking it was from winterization fogging.

Thank you.
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Old 04-29-2018, 10:54 AM
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mustangtexas mustangtexas is offline
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I wouldn't think 200* would do that.
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Old 04-29-2018, 11:10 AM
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fiberglass? can you remove what is there for a better shot? maybe it’s the impeller
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Old 04-29-2018, 12:41 PM
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I can't see much in the pics, but fiberglass coming out of your flaps would likely be baffles from the muffler(s).
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Old 04-29-2018, 01:13 PM
waterlogged882 waterlogged882 is offline
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In addition to the consideration of the muffler(s), I am betting an internal hose meltdown.

Been there more than once over the years.

Check/change out the exhaust hoses regardless of any other assessment and conclusion.

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Old 04-29-2018, 02:04 PM
avorob avorob is offline
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Closer image of exuast

Here is a closer image. THi sticking out fibers are somewhat melted together.

So, shall I try to run the boat and what the temp gauge?
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Old 04-29-2018, 02:40 PM
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mustangtexas mustangtexas is offline
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I still believe the water temp would need to be a lot more than 200 to do damage. Water boils at 210ish and those materials would survive that plus some. If no water to engine and you went as far as you did plus idling before driving I bet you went well above 300. Higher temps could do damage to a number of components.
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Old 04-29-2018, 03:04 PM
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Quote:
Originally Posted by avorob View Post
Here is a closer image. THi sticking out fibers are somewhat melted together.

So, shall I try to run the boat and what the temp gauge?
I bet those are the fibers from the hoses.
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Old 04-29-2018, 03:13 PM
waterlogged882 waterlogged882 is offline
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Quote:
Originally Posted by Table Rocker View Post
I bet those are the fibers from the hoses.

^ this

I melted this one last summer. Most wet exhaust hose are rated around ~210 deg. F.

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Last edited by waterlogged882; 04-29-2018 at 03:29 PM.
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Old 04-29-2018, 03:17 PM
waterlogged882 waterlogged882 is offline
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Quote:
Originally Posted by avorob View Post
So, shall I try to run the boat and what the temp gauge?
I'd check a few things before I ran it but ultimately there's only one way to see if it runs....

Your currently installed OEM temperature gauge should work just fine.

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