Ice Impact: The Invisible Killer of Stainless Props
Hit floating ice? Your prop might look fine, but stainless steel hides microscopic fractures. We use dye penetrant and micro-welding to fix them.
The "Invisible" Damage
In Northern waters (Alberta and Saskatchewan), ice impact is common in spring and fall. Stainless steel is brittle compared to Aluminum. When it hits ice, it may not bend—it may crack internally.
Microfractures Explained
A "Microfracture" is a hairline crack often invisible to the naked eye. Over time, under the cyclic stress of rotation (thousands of RPM), these cracks propagate. Eventually, a blade shears off—often destroying your lower unit in the process.
Our Repair Protocol
- Dye Penetrant Inspection: We coat the prop in a penetrant dye that seeps into microfractures, revealing them under specific lighting.
- Micro-Welding: We use precision TIG welding to fill these fractures from the root, not just cover them up.
- Stress Relief: The welded area is heat-cycled to prevent brittleness.
Don't risk your outdrive. If you hit ice, get it scanned.