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SW Florida
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16 Posts
Discussion Starter #1
I thought I'd post these pictures of the thermostat from my 15. I've flushed it well after saltwater use but I bought it used, so I didn't know if the previous owner did.
The bottom cylinder is getting much hotter than the top one so I suspect the gunk has blocked a coolant passage. I'm going  to take the head off to look further. I'm going to try salt-away but I've read a few posts that it really doesn't help.

 

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904 Redfish
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605 Posts
used to have that same motor and it is one of the best motors ever had mine new put over 3000 hours on it beat it to hell with hittin ground and whatnot still ran perfect the day I sold it and its still running.
 

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SW Florida
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16 Posts
Discussion Starter #3
Shadowcast777 - I think they're good motors too. I got this one to replace one that I bought new in 2000 but was stolen. I'm hoping I can get this one fixed up.
 

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Light, Strong, Cheap. Pick Two.
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1,385 Posts
Be very very careful breaking the head bolts loose. They can easily break off in the case. If they are stiff, work them in and out until they come out easily. Dont try to muscle them out.

I broke on off in my 25 Yami
 

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Registered
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1,544 Posts
Be very very careful breaking the head bolts loose.  They can easily break off in the case.  If they are stiff, work them in and out until they come out easily.  Dont try to muscle them out. 

I broke on off in my 25 Yami
^ Nothing a little Blue Wrench can't handle!
 

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786 Posts
Hi Creek Runner,

I live in Sebastian and my family and I keep our boats on lifts, so we seldom flush them. I want to know where to get "Blue Wrench" and is it a tool or penetrating oil.

Thanks and best regards,
Frank_S

PS I am used to working with a torch in one hand and a wrench in the other, but don't enjoy it.
Frank
 

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Brandon, FL
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10,703 Posts
Frank- and everyone else
A mixture of 50% ATF (auto trans fluid) and 50% acetone is the best penetrating lube you can get.

Look around on machinist forums and you will find the same.
 

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> PRO STAFF <
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7,519 Posts
thats a plasma torch lol


Not quite CR, look closely.
It's just an oxy-acetylene cutting torch.
Plasma torch has a high voltage power cable
and a different head



I can afford oxy-acetylene, but not a plasma setup.  ;)
 

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SW Florida
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16 Posts
Discussion Starter #12
I finally had time to remove the head. The head bolts came off easily (might be a first!) It was not pretty.


The passage circled in yellow was completely blocked by white corrosion. In this picture I had already scraped some of it off.



Heat damage on head:


Blocked passage on the head as well:


I've got a new head and gasket on order - not even going to try and clean this up. This motor runs well except for a rough idle...
 
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