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Cracked! - Need a lower unit for Honda BF40 (1997)
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Wood Zeppelin



Joined: 09 Feb 2016
Posts: 336
City/Region: Seattle
State or Province: WA
C-Dory Year: 1997
C-Dory Model: 22 Angler
Vessel Name: C-Creature
Photos: Childhood Dream
PostPosted: Mon Jun 03, 2024 11:26 pm    Post subject: Reply with quote
srbaum wrote:
WZ,
I repair about 50 outboards a year and have repaired near a thousand in my lifetime. I would not waste my time with repairing it. I would buy a used one in almost 90% of the cases. I have had good luck with buying used ones from reputable shops that sell used lower units. Most of these reputable shops will replan a defective unit.


Thanks for this advice! I was able to find a used version of the upgraded design. I got it all put together and went for a test drive today. There is a noise I never heard before, kind of a "whirring/ringing" sound that occurs between about 2000-2700 RPM.

With the motor in neutral, the prop spins fine, no noise or anything. Here are the things that have changed since before the noise:

New (used 2007) lower unit.
New impeller
New gear case oil
New prop (different pitch as Ive gone from sea level to 3000' elevation)

My fear is that after dropping $1000 on a *used* lower unit, there's something wrong with it?

Or could it be something else?

Should I even worry since it sounds just fine above and below that RPM range?
_________________
James Salay - Real Estate Broker / Investor, Engineer, Artist, Fisherman, Canyoneer, Outdoor Enthusiast






Current boats:

1997 22' Angler - "C-Creature"
1988 16' Angler - "E-fishn-C"
1997 16' Cruiser - "Wet-a-Net"

Also:
14.5' Drift Boat - "Wood Zeppelin"
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Wood Zeppelin



Joined: 09 Feb 2016
Posts: 336
City/Region: Seattle
State or Province: WA
C-Dory Year: 1997
C-Dory Model: 22 Angler
Vessel Name: C-Creature
Photos: Childhood Dream
PostPosted: Mon Jun 03, 2024 11:30 pm    Post subject: Reply with quote
Oh and one more variable.

I was operating it today at 6000' elevation! Much higher than ever before. Could the noise have something to do with that, rather than coming from the lower unit?
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