MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone.
You are invited to join our public Boat Repair Forum to seek assistance from other members.
You may also visit the Boat Motor Manuals section of our site to obtain a service manual.
Quicksilver is the Mercury / Mercruiser name put on accessories.-----23 " pitch-----What prop is on your unit now ?---23" pitch may not be suitable for your application and may cause damage to the engine !
It may wor you have a 14.5X21 and the spare is a 13.5x23 what is the WOT rpm on your present setup?