Start relays switch high DC currents. They can actually weld themselves closed resulting in uncontrollable cranking. I would not try to save money on a cheap replacement not intended for this severe service.
2004 Rebel 250, 2003 BMW K1200GT (roadburner), 2004 BMW R1200GS(all purpose),
1973 Norton Interstate (in a box in the basement)
1968 Triumph Bonneville
If it's not a gasoline engine starter relay, then what @Duckster said, it could weld itself closed and destroy the starter, the relay, and the battery
If it is a starter relay for an ATV, Motorcycle, Jet Ski, go-cart, 2.5kw generator or bigger, or other gasoline engine that's at least 15hp it will probably be fine...but poking around here on the websites in the states and it seems only pennies more for a correct relay?
2009 Honda Rebel 250 "The bravest thing for me to do is admit when I am wrong" - unknown HRF Answer #1 You should take the MSF Rider Course HRF Answer #2 You need to clean your carburetor HRF Answer #3 Sorry we assumed if you didn't say otherwise