Went on a run this past weekend and it seems the boat lost 5-6mph. Running a 25 tempest (yes i know its too small, its my fishing prop) on a 225 proxs on a 94 209. Previous best with this prop was 76.4 solo with a little left in it, right on the limiter.
Had the perfect conditions, 60 degree air temps. It had rained that morning so the boat was a bit heavier I would guess with the carpet pretty soaked. Bilge pump was kicking on throughout the day as it drained.
I tried the jackplate at every setting I had and it just wasnt having it. 69 change at 5800 rpm. Interestingly the higher I brought the plate the slower it went. When my jackplate is all the way down its about 5" below pad. I brought it as high as 2" below and it never improved. The boat never chine walked, it usually does around 70. It never even bumped the limiter once and it should have several times on this run. I was pegged to the floor. I will say i was also running with a passenger, but should I expect this much speed loss from this? Nothing else has really changed, same about of fuel, gear, batteries etc. Motor feels strong throughout the rpm range, but it just hit a wall at 68 - 69.
With this combo the boat has gone well into the 70s with passenger and same load. My first thought is I am not getting full wide open throttle but it never had that issue before.
Your thoughts?
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Originally Posted by low slung cruiser
