doug rumball
New Member
- Jun 12, 2023
- 5
- Boat Info
- prop size for 1979 225 SeaRay
- Engines
- 350 mercury 260hp
looking for any info for the original prop on a 1979 searay 225 with a 260hp /350merc thunderbolt iv
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It is a weekenderWelcome to CSR. Which model 225?
You didn't identify the drive... but I'm guessing it was a MerCruiser R/MR/Alpha series...
If so, it would've had 1.50:1ish gear ratio and would swing a 23p stainless if you were light, or a 21p loaded... or a 21p aluminum or 19p aluminum...
On Sea Ray's site is a prop chart - you can look it up for your boat model and find the prop used based on the engine/drive you have.
Use the RPM - that's exactly it's there for and the proper way to get on plane. Also make sure the drive is trimmed all the way down and use your tabs (if you have them).