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I have a 2003 Yamaha 175 HPDI engine and I am trying to re-prop my boat correctly. What is the max RPM for this year of engine? The Yamaha website list 6,000 RPM but I have been told this is for the newer HPDI engines. Is the RPM max for mine 5,500?
Cousinabe, I looked at the website and it looks like they only tested two boats in my category with this HP. They were a stratos and a Warrior. The weight of the boats tested were close to mine (Triton 189). The speed they had was little better then what I am seeing with the prop I tried last night.
