Mercury-Mercruiser 48-8M0055550 Replaced by 48-8M0151363

SPITFIRE X7 40 CT - 115 HP STANDARD
SpitFire X7, a new stainless steel propeller designed to increase speed and acceleration on all boat types with mid‑range outboards. The SpitFire X7 is the first propeller for 40 hp CT ‑ 115 hp outboards.

Manufactured with Mercury's proprietary X7 Stainless Steel Alloy providing additional strength and durability, like the aluminum SpitFire, the stainless steel SpitFire X7’s small diameter generates unmatched acceleration while the aggressive blade design and cup create exceptional speed and holding.  

For 40‑60 HP CT 4‑Stroke and 75‑115 HP standard 2 and 4‑Stroke outboards (Flo‑Torq II)
If RPM is appropriate with the current 3‑blade prop, replace with the same pitch.
13" – 21" pitch RH only
Equipped with Flo‑Torq II hub system.