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KL Engine Running Hot

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Tmalko
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KL Engine Running Hot

Post by Tmalko » Fri Jan 01, 2021 6:17 am

Manifold output running hotter on port side KL engine. Besides a possible water pump issue what other causes are possible and how would you isolate it?

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drrot
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Re: KL Engine Running Hot

Post by drrot » Fri Jan 01, 2021 9:49 am

You mention the port engine is running warm. How warm? Is there a noticeable difference in water output when they both run at idle?
Jim Staib
www.finewoodboats.com


1947 Penn Yan 12' Cartopper WXH474611
1950 Chris-Craft 22' Sportsman U-22-1532
1957 Chris-Craft 26' Sea Skiff SK-26-515
1968 Century 17' Resorter FG-68-174

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Captain Nemo
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Re: KL Engine Running Hot

Post by Captain Nemo » Fri Jan 01, 2021 9:50 am

It could also have some mud and rust blocking the water jacket too. It’s best to remove the manifold and take of the cap and exhaust elbow off, run a coat hanger thru and flush with water.
I would start with the water pump first. If it has a rubber impeller, it could be worn or missing some vanes.
Boats are to be made of wood, otherwise, God would have grown fiberglass trees.

Tmalko
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Re: KL Engine Running Hot

Post by Tmalko » Fri Jan 01, 2021 4:07 pm

Thanks for the responses. The temperature increases at a higher RPM and I saw about a 50 degree difference. The water pumps are the Sherwood type that you have to grease with the metal gear impeller. I’ve heard they are not efficient. That was my first suspect. I Like the coat hangar idea. Appreciate your time.

jfrprops
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Re: KL Engine Running Hot

Post by jfrprops » Fri Jan 01, 2021 8:24 pm

start with the pump....don't pull the manifold if you don't have to...

John in Va
1980 Fairchild Scout 30
19?? custom Argentine Runabout 16'
1954 Whirlwind deluxe dual ckpt 16'
1921 Old Town Charles River 17' (founding Captain, James River Batteau Festival)

Tmalko
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Re: KL Engine Running Hot

Post by Tmalko » Sat Jan 02, 2021 6:12 am

Thanks John!

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drrot
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Re: KL Engine Running Hot

Post by drrot » Sat Jan 02, 2021 10:01 am

I'd start with a temp gun to make sure the gauges are accurate. Handy in the kitchen when this project is over. If they are accurate swap the water pumps. Remember that the inlet/outlet change with engine rotation.
tempgun.jpg
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Jim Staib
www.finewoodboats.com


1947 Penn Yan 12' Cartopper WXH474611
1950 Chris-Craft 22' Sportsman U-22-1532
1957 Chris-Craft 26' Sea Skiff SK-26-515
1968 Century 17' Resorter FG-68-174

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Bilge Rat
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Re: KL Engine Running Hot

Post by Bilge Rat » Sat Jan 02, 2021 11:42 am

Second on the infrared temperature gun. Can also be used to pinpoint hot spots on the manifold or head.
1966 Lyman Cruisette 25 foot "Serenity Now!"
1953 Chris Craft Sportsman 22 foot "Summerwind"

jfrprops
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Joined: Thu Dec 29, 2005 10:41 pm
Location: Powhatan Courthouse Virginia

Re: KL Engine Running Hot

Post by jfrprops » Sat Jan 02, 2021 6:14 pm

oh yes...heat gun FIRST ... no question about it
John in Va.
1980 Fairchild Scout 30
19?? custom Argentine Runabout 16'
1954 Whirlwind deluxe dual ckpt 16'
1921 Old Town Charles River 17' (founding Captain, James River Batteau Festival)

Tmalko
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Joined: Mon Oct 08, 2018 5:31 am

Re: KL Engine Running Hot

Post by Tmalko » Thu Jan 07, 2021 5:38 pm

Excellent. Thank you!

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