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Pacificcoast101
Joined: 29 Sep 2007 Posts: 717 City/Region: Torrance
State or Province: CA
C-Dory Year: 2008
C-Dory Model: 255 Tomcat
Vessel Name: No Pressure
Photos: No Pressure
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Posted: Tue Dec 31, 2019 9:34 pm Post subject: Honda BF150 overheated, now won't move |
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We had just throttled up outside the marina when the starboard motor revved up and the overheating light and alarm sounded. I shut the motor down immediately and checked for kelp or plastic blocking the intake. Everything was clear. After a few minutes, I started the motor but despite the throttle shifting into gear, the propeller wouldn't spin.
We came back in under the power of the other motor. Back in the slip, I found that the propeller will lock while in forward and reverse gears and spin while in neutral, but will not turn with the motor on. There is also no pee stream. I'm going to haul the boat out and replace the impeller but was wondering if the prop not turning is a safety feature in the motor or do I have bigger problems to deal with? _________________ Phil Garner
2008 Tomcat 255
No Pressure
Southern California Marine Life
https://www.flickr.com/photos/southern_california_marine_life/albums
My Photos
https://www.alamy.com/stock-photo/?pseudoid=%7bAC42A235-FD0A-464A-B559-1CC5843C95FB%7d&name=Phil+Garner&st=11&mode=0&comp=1 |
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TyBoo
Joined: 23 Oct 2003 Posts: 5314 City/Region: Warrenton
State or Province: OR
C-Dory Year: 1996
C-Dory Model: 25 Cruise Ship
Vessel Name: TyBoo
Photos: TyBoo
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Posted: Tue Dec 31, 2019 10:02 pm Post subject: |
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I would guess that the hub in the prop has spun and the output shaft turns inside of it when in gear.
That's just my guess, though. I don't think there is any other safety feature to create the conditions you found. The other option would be the splines on the drive shaft stripped but we do not want that to be it.
Sorry I can't do more than guess, and sorry for your troubles. Please keep us posted. _________________ TyBoo Mike
Sold: 1996 25' Cruise Ship
Sold: 1987 22' Cruiser |
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tsturm
Joined: 01 Nov 2003 Posts: 1134 City/Region: Soldotna
State or Province: AK
C-Dory Year: 2003
C-Dory Model: 25 Cruiser
Vessel Name: JMR TOO
Photos: JMR-TOO
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Posted: Tue Dec 31, 2019 10:33 pm Post subject: Re: Honda BF150 overheated, now won't move |
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Pacificcoast101 wrote: | We had just throttled up outside the marina when the starboard motor revved up and the overheating light and alarm sounded. I shut the motor down immediately and checked for kelp or plastic blocking the intake. Everything was clear. After a few minutes, I started the motor but despite the throttle shifting into gear, the propeller wouldn't spin.
We came back in under the power of the other motor. Back in the slip, I found that the propeller will lock while in forward and reverse gears and spin while in neutral, but will not turn with the motor on. There is also no pee stream. I'm going to haul the boat out and replace the impeller but was wondering if the prop not turning is a safety feature in the motor or do I have bigger problems to deal with? |
Or the drive shaft broke where the splines enter the crank shaft.
That would explain no water pump. Been there before |
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Pacificcoast101
Joined: 29 Sep 2007 Posts: 717 City/Region: Torrance
State or Province: CA
C-Dory Year: 2008
C-Dory Model: 255 Tomcat
Vessel Name: No Pressure
Photos: No Pressure
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Posted: Tue Dec 31, 2019 11:53 pm Post subject: |
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Would that still allow the prop to lock into forward and reverse gears and spin in neutral? |
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TyBoo
Joined: 23 Oct 2003 Posts: 5314 City/Region: Warrenton
State or Province: OR
C-Dory Year: 1996
C-Dory Model: 25 Cruise Ship
Vessel Name: TyBoo
Photos: TyBoo
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Posted: Wed Jan 01, 2020 12:38 am Post subject: |
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Yes, any of the above guesses could do that. If the prop hub is the culprit there could be enough grip left to make it difficult to slip by hand. The same with stripped splines or a broken drive shaft if it is bound internally between the gearbox and the break.
Now that I think about it the water pump not working makes the culprit more likely to be the shaft not being turned by the motor as tsturm said. Whatever it is should become clear when the lower unit is pulled to check the impeller in the water pump. |
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tsturm
Joined: 01 Nov 2003 Posts: 1134 City/Region: Soldotna
State or Province: AK
C-Dory Year: 2003
C-Dory Model: 25 Cruiser
Vessel Name: JMR TOO
Photos: JMR-TOO
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Posted: Wed Jan 01, 2020 2:49 pm Post subject: |
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Pacificcoast101 wrote: | Would that still allow the prop to lock into forward and reverse gears and spin in neutral? |
Yup. I won't say LOCK But it will be darn hard to turn.
(if you turn your prop hard enough while in gear you can turn the engine over, I would advise against that.)
pull the lower unit off & let us know. Have a great new year!!! |
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tsturm
Joined: 01 Nov 2003 Posts: 1134 City/Region: Soldotna
State or Province: AK
C-Dory Year: 2003
C-Dory Model: 25 Cruiser
Vessel Name: JMR TOO
Photos: JMR-TOO
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Posted: Wed Jan 01, 2020 3:43 pm Post subject: |
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tsturm wrote: | Pacificcoast101 wrote: | Would that still allow the prop to lock into forward and reverse gears and spin in neutral? |
Yup. I won't say LOCK But it will be darn hard to turn.
(if you turn your prop hard enough while in gear you can turn the engine over, I would advise against that.)
pull the lower unit off & let us know. Have a great new year!!! |
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cmetzenberg
Joined: 04 Jan 2014 Posts: 367 City/Region: Santa Barbara
State or Province: CA
C-Dory Year: 2007
C-Dory Model: 255 Tomcat
Vessel Name: Kanaloa
Photos: Kanaloa
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Posted: Thu Jan 02, 2020 9:47 am Post subject: |
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I've got a spare BF 150 lower if you end up needing one....lots of other BF 150 parts too. _________________ Conrad Metzenberg
07' Tomcat 255 "Kanaloa"
87' Boston Whaler Guardian 17 (BlackFlag, 03-14)
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Pacificcoast101
Joined: 29 Sep 2007 Posts: 717 City/Region: Torrance
State or Province: CA
C-Dory Year: 2008
C-Dory Model: 255 Tomcat
Vessel Name: No Pressure
Photos: No Pressure
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Posted: Thu Jan 02, 2020 7:49 pm Post subject: |
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I'll keep that in mind. We pulled the lower unit today and the drive shaft sheared off, just like tsturm's photo. |
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cmetzenberg
Joined: 04 Jan 2014 Posts: 367 City/Region: Santa Barbara
State or Province: CA
C-Dory Year: 2007
C-Dory Model: 255 Tomcat
Vessel Name: Kanaloa
Photos: Kanaloa
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Posted: Thu Jan 02, 2020 11:27 pm Post subject: |
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Pacificcoast101 wrote: | I'll keep that in mind. We pulled the lower unit today and the drive shaft sheared off, just like tsturm's photo. |
port or starboard engine? |
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Pacificcoast101
Joined: 29 Sep 2007 Posts: 717 City/Region: Torrance
State or Province: CA
C-Dory Year: 2008
C-Dory Model: 255 Tomcat
Vessel Name: No Pressure
Photos: No Pressure
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Posted: Fri Jan 03, 2020 11:45 am Post subject: |
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Starboard. |
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localboy
Joined: 30 Sep 2006 Posts: 4656 City/Region: Lake Stevens via Honolulu
State or Province: WA
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: 'Au Kai (Ocean Traveler)
Photos: 'AU KAI
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Posted: Fri Jan 03, 2020 3:07 pm Post subject: |
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Something is wrong with that shear. It's way too clean and perfect. Makes me wonder about a defect in manufacturing. In the photo it actually looks like two, separate machined pieces. _________________ "We can go over there...behind the 'little one'....."
Wife to her husband pointing @ us...from the bow of their 50-footer; Prideaux Haven 2013 |
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tsturm
Joined: 01 Nov 2003 Posts: 1134 City/Region: Soldotna
State or Province: AK
C-Dory Year: 2003
C-Dory Model: 25 Cruiser
Vessel Name: JMR TOO
Photos: JMR-TOO
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Posted: Fri Jan 03, 2020 3:26 pm Post subject: |
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localboy wrote: | Something is wrong with that shear. It's way too clean and perfect. Makes me wonder about a defect in manufacturing. In the photo it actually looks like two, separate machined pieces. |
Don't know about the Honda, the Yamaha in the pict. has a relief cut where it broke. Worked just like it was designed to & saved the crank. |
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Pacificcoast101
Joined: 29 Sep 2007 Posts: 717 City/Region: Torrance
State or Province: CA
C-Dory Year: 2008
C-Dory Model: 255 Tomcat
Vessel Name: No Pressure
Photos: No Pressure
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Posted: Fri Jan 03, 2020 5:20 pm Post subject: |
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Cell phone photos of my Honda drive shaft. |
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Moxieabs
Joined: 02 Nov 2003 Posts: 208 City/Region: Cape Neddick
State or Province: ME
C-Dory Year: 2003
C-Dory Model: 22 Cruiser
Vessel Name: Widget
Photos: Widget
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Posted: Fri Jan 03, 2020 5:30 pm Post subject: |
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Any sign of the prop hitting debris? Is th prop SS or aluminum? _________________ Moxieabs on WIDGET |
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