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Hercules KFL engine noise, help appreciated
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Hercules KFL engine noise, help appreciated
<t>My 1957 Hercules Kfl engine started to make a noise recently
I took the generator off thinking is the bearing. the noises is very profound metal squealing coming from the area of the fly wheel
The noise definitely changes with the RPM and sometimes comes and goes. sometimes gets louder sometimes quieter<br/>
I can’t find any detailed drawing or parts Info For that area
Any thoughts or assistance would be greatly appreciated
I tried to load a short video and sound but I don't think the site allows this.
I took the generator off thinking is the bearing. the noises is very profound metal squealing coming from the area of the fly wheel
The noise definitely changes with the RPM and sometimes comes and goes. sometimes gets louder sometimes quieter<br/>
I can’t find any detailed drawing or parts Info For that area
Any thoughts or assistance would be greatly appreciated
I tried to load a short video and sound but I don't think the site allows this.
Regards
Mark
1957 Chris Craft 28’ Sedan with Flybridge
Mark
1957 Chris Craft 28’ Sedan with Flybridge
- Matt Smith
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Re: Hercules KFL engine noise, help appreciated
Put the video on youtube and post a link.
As to the sound and issue. It's the internet, so it will most likely be one of 4000 things. HA.
As to the sound and issue. It's the internet, so it will most likely be one of 4000 things. HA.
1948 25' Chris Craft Sportsman
1937 16' Special Racer
1968 40' Rice Trawler
1968 11' Crab Skiff
2018 Hole in my head
WoodyBoater.com
1937 16' Special Racer
1968 40' Rice Trawler
1968 11' Crab Skiff
2018 Hole in my head
WoodyBoater.com
Re: Hercules KFL engine noise, help appreciated
Have you tried taking a length of small diameter hose to your ear and moving the hose around that part of the engine? Might help in pin pointing the exact location of the noise. I know this is tough around a spinning flywheel. Although it seems to come from the front of the engine, a vacuum leak at a carb or the intake manifold can cause a lot of noise too. Exhaust manifold leaks can sound mechanical as well.
Hows the oil pressure?
Hows the oil pressure?
1966 Lyman Cruisette 25 foot "Serenity Now!"
1953 Chris Craft Sportsman 22 foot "Summerwind"
1953 Chris Craft Sportsman 22 foot "Summerwind"
Re: Hercules KFL engine noise, help appreciated
Generator belt squealing?
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Re: Hercules KFL engine noise, help appreciated
were it the other end of the engine...I would suspect Damper Plate////but NOT....good luck...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)
19?? custom Argentine Runabout 16'
1954 Whirlwind deluxe dual ckpt 16'
1921 Old Town Charles River 17' (founding Captain, James River Batteau Festival)
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Re: Hercules KFL engine noise, help appreciated
https://youtu.be/S7G9xarIzIM
the scraping sound is definitely coming from the flywheel area. I wish it were coming somewhere else where it can be easily worked on!)
the scraping sound is definitely coming from the flywheel area. I wish it were coming somewhere else where it can be easily worked on!)
Regards
Mark
1957 Chris Craft 28’ Sedan with Flybridge
Mark
1957 Chris Craft 28’ Sedan with Flybridge
- Captain Nemo
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Re: Hercules KFL engine noise, help appreciated
Sounds like the flywheel is scraping on something, check if the flywheel bolts are tight. Hopefully this is external and not something worse.
Boats are to be made of wood, otherwise, God would have grown fiberglass trees.
Re: Hercules KFL engine noise, help appreciated
Any work done recently? There are two shoulder bolts in the flywheel housing. Are they still there and in the right place?
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
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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Re: Hercules KFL engine noise, help appreciated
No work done recently. The 4 flywheel to crankshaft bolt look tight. Not familiar with the 2 housing bolts. I ran my hand around the flywheel as best as I could, considering it is very tight space, and did not feel any obstruction. Is it possible that the belt pulley sheered from the shaft?
Regards
Mark
1957 Chris Craft 28’ Sedan with Flybridge
Mark
1957 Chris Craft 28’ Sedan with Flybridge
Re: Hercules KFL engine noise, help appreciated
Not likely. The pulley is part of the flywheel.
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
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
- Jim Godlewski
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Re: Hercules KFL engine noise, help appreciated
A couple of questions... why do I not see the generator? I would have guessed the generator pulley broke and rubbing but I don't see it. What is the red piece at the 8 second point in the video?
1956 17 Sportsman CC-17-2310
1930 Model 100 7152
1930 Model 100 7152
- Captain Nemo
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Re: Hercules KFL engine noise, help appreciated
Jim, he pulled the generator thinking that may be the noise, the red thing appears to be the label on the belt he left on.
The next thing I would do is pull the starter and inspect it to see if the flywheel is rubbing on that somewhere. May end up pulling the flywheel if nothing is scraping on the starter.
The next thing I would do is pull the starter and inspect it to see if the flywheel is rubbing on that somewhere. May end up pulling the flywheel if nothing is scraping on the starter.
Boats are to be made of wood, otherwise, God would have grown fiberglass trees.
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Re: Hercules KFL engine noise, help appreciated
Engine not running, there is plenty of gap between the starter and flywheel. I’m thinking the flywheel and generarator pulley are separate, cannons confirm, and the noise is from the pulley. Almost impossible to inspect due to tight clearances.
Flywheel inspected has no unusual wear patterns. Sound definitely from this area and is metal scraping and varies with rpm.
Flywheel inspected has no unusual wear patterns. Sound definitely from this area and is metal scraping and varies with rpm.
Regards
Mark
1957 Chris Craft 28’ Sedan with Flybridge
Mark
1957 Chris Craft 28’ Sedan with Flybridge
- Captain Nemo
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Re: Hercules KFL engine noise, help appreciated
Pulling the flywheel is the next course of action. Not an easy task right up against the bulkhead like that.
By the way, what boat are you working on there, Sedan Cruiser?
By the way, what boat are you working on there, Sedan Cruiser?
Boats are to be made of wood, otherwise, God would have grown fiberglass trees.
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Re: Hercules KFL engine noise, help appreciated
Yes
1957 sedan cruiser with flybridge and access to the front of the engine is extremely difficult
1957 sedan cruiser with flybridge and access to the front of the engine is extremely difficult
Regards
Mark
1957 Chris Craft 28’ Sedan with Flybridge
Mark
1957 Chris Craft 28’ Sedan with Flybridge
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Re: Hercules KFL engine noise, help appreciated
I will pull the fly wheel but I believe it is separate then the pulley for the generator when I do so I can’t use that engine anymore for the end of the season I just can’t find it drawings or parts diagram for that year and engine
Regards
Mark
1957 Chris Craft 28’ Sedan with Flybridge
Mark
1957 Chris Craft 28’ Sedan with Flybridge
- Captain Nemo
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Re: Hercules KFL engine noise, help appreciated
I understand the clearance problem What I saw in the video looked very familiar, I have a '56 Sedan 28'. When you get this apart you might find that what you have there is repairable. I don't know right off hand how that pulley is held in place, it could be welded.
Boats are to be made of wood, otherwise, God would have grown fiberglass trees.
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Re: Hercules KFL engine noise, help appreciated
An update:
Both engines have been fully machined and parts inspected. I am currently taking my time assembling the engines since I missed the B-season, UGH. Many things were discovered during breakdown: spun rod bearing (cyl. #2) which was likely the noise, several clogged water passages, cracks in the exhaust manifold (which I hope to find a very experienced welder.....for repair). Cam/Crank/rods will be re-used after inspection and minor surfacing, but everything else is new. Assembly pics to follow soon.
thanks to this forum for the technical support!
Both engines have been fully machined and parts inspected. I am currently taking my time assembling the engines since I missed the B-season, UGH. Many things were discovered during breakdown: spun rod bearing (cyl. #2) which was likely the noise, several clogged water passages, cracks in the exhaust manifold (which I hope to find a very experienced welder.....for repair). Cam/Crank/rods will be re-used after inspection and minor surfacing, but everything else is new. Assembly pics to follow soon.
thanks to this forum for the technical support!
Regards
Mark
1957 Chris Craft 28’ Sedan with Flybridge
Mark
1957 Chris Craft 28’ Sedan with Flybridge
Re: Hercules KFL engine noise, help appreciated
Make sure these get in the right place. They will cause funky noises if not installed properly.
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
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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Re: Hercules KFL engine noise, help appreciated
thanks Jim.
Flywheel to crank bolts??
Flywheel to crank bolts??
Regards
Mark
1957 Chris Craft 28’ Sedan with Flybridge
Mark
1957 Chris Craft 28’ Sedan with Flybridge
Re: Hercules KFL engine noise, help appreciated
NO. Front motor mount to block. They align the two and stop the flywheel from hitting the front motor mount.
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
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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Re: Hercules KFL engine noise, help appreciated
Just an update.
During my current rebuild of my 2 herds, it was discovered that the noise in question was likely a spun rod bearing, large end at #1 piston
Would make sense
Machine shop resolved issue with bore of connecting rod and I am currently in assembly mode for both engines.
Regards
During my current rebuild of my 2 herds, it was discovered that the noise in question was likely a spun rod bearing, large end at #1 piston
Would make sense
Machine shop resolved issue with bore of connecting rod and I am currently in assembly mode for both engines.
Regards
Regards
Mark
1957 Chris Craft 28’ Sedan with Flybridge
Mark
1957 Chris Craft 28’ Sedan with Flybridge
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