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Posts: 422
| Hi,
I have a couple questions regarding the prop on my rig. First off, I am running a Crestliner 1850 fishhawk with a suzuki DF140 fourstroke. My prop is a suzuki 3X14X20 and does have some vent holes. Max RPM for this motor is 6200. Motor is mounted in the middle hole and the anti-cavitation plate (the fin just above the prop) appears to be just at or below the keel. The keel on crestliners run the entire length.
Today, out on the river with the wife and two young kids and full tank of fuel three batteries and TM, I got 39-40mph up river with about 5600 -5700 RPMs and then down river I got 44mph and 5700 - 5900RPMs but that was all the way trimmed throwing rooster. Just a note, the ol'miss was running a little high and swift today.
Just trying to tweak the set up to attain maximum performance for the motor. I would like to think I could get a few more mph's out of this, but I thought I would ask here for some opinions. I am thinking of taking the prop to a shop and having it changed to 19pitch to get the rpms up to the correct max. I can also have the motor raised two holes yet so I was considering that, but not sure how that would affect things. Would that in itself add rpms or does it do something entirely different? On top of that, crestliners like to run flat so would any of this add some bow lift?
A lot going on here, and the boat does run well overall now, just interested in getting it tweaked to run the best it can.
Thanks
Craig | |
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