4-blade 9.9-20hp Mercury Mariner & Tohatsu Aluminium-Titanium Propeller

4-blade 9.9-20hp Mercury Mariner & Tohatsu Aluminium-Titanium Propeller

Marsoni

M251S

$69.95

Get it in 3 business days with 1 day shipping. Friday, May 29

4-blade 9.9-20hp Mercury Mariner & Tohatsu Aluminium-Titanium PropellerA choice of titanium aluminium 4 blade propellers from PolaStorm in black with pressed hubs to suit Mercury, Mariner & Tohatsu 9. 9 20hp outboards. In general terms, 4 blade propellers can provide more grip at lower RPM and offer more stern lift, helping stern heavy boats get on the plane and keeping boats on the plane at lower RPM's. This could assist smaller tiller outboard controlled boats. PolaStorm manufactured propellers have some additional

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Definitely better than the old plugs that probably had 80k miles on them. The one star off is because I had a misfire after installing. Not sure if I damaged the plug or what, but a reinstall didn't fix the misfire. In my genius, I rushed to try to gap it and ended up breaking the iridium tip. Put the old plug into cylinder 3 (where the misfire was) and it was fine. Gonna have to get a new single tomorrow at my local shop, but a bit frustrating to get a misfire after install.

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Reviewed in the United States on April 27, 2026