Osprey 175 Repower to DF140

[BMAC1988]

That prop looks identical to the 4 blade that I have.  The prx4 is a more aggressive looking prop

[BMAC1988]

Got a good pic of 'er sitting in the water,  full of fuel and full cooler under the leaning post.  Ran awesome all day long with me and 2 other adults and associated crap and was getting just over 5mpg. 

Been having an issue with the reversing relay for the jackplate......  The switch input leads keep loosing contact inside the relay and it stops working,  I can move/hot-wire it to make it work but need to find a better solution.  I think the vibration from being mounted directly on the motor is breaking the connection loose

[RickK]

Looks great.

[Basketcase]

As a reference, I top out at 36 mph with an Etec 90 on my 175 with a 3 blade aluminum prop. I think you should be able to do better.

[wingtime]

What RPMS are you getting at WOT and what size and pitch prop are you running?  I can get 38 MPH out of my 170 with a 90hp Ocean Pro.  I know a little more pitch would give me more top end If I wanted it.

It is very critical for the Etec to be propped right.  If you are over propped you will have problems with high exhaust temperatures and carbon build up.

[Basketcase]

I don't want to hijack his thread but I can hit 5k. The max rpm in the emm is like 5200. I suspect I could be slightly over propped but not a lot. 4500 to 5500 is recommended. My speed is GPS and would be effected by currents which can be strong where I go sometimes.

[larsli68]

Great looking boat! 

//Lars

[wingtime]

Basketcase... the optimum rpm range for the I3 90 is 5000-5200 rpm. The max wot rpm range is 5500. You could use 200 more rpm.

[CTsalt12]

Got a good pic of 'er sitting in the water,  full of fuel and full cooler under the leaning post.  Ran awesome all day long with me and 2 other adults and associated crap and was getting just over 5mpg. 

Been having an issue with the reversing relay for the jackplate......  The switch input leads keep loosing contact inside the relay and it stops working,  I can move/hot-wire it to make it work but need to find a better solution.  I think the vibration from being mounted directly on the motor is breaking the connection loose

Looks great indeed.  How does she sit in the water? 

[BMAC1988]

Got a good pic of 'er sitting in the water,  full of fuel and full cooler under the leaning post.  Ran awesome all day long with me and 2 other adults and associated crap and was getting just over 5mpg. 

Been having an issue with the reversing relay for the jackplate......  The switch input leads keep loosing contact inside the relay and it stops working,  I can move/hot-wire it to make it work but need to find a better solution.  I think the vibration from being mounted directly on the motor is breaking the connection loose

Looks great indeed.  How does she sit in the water?

1st I would like to apologize for reviving an old thread as I have not been on here in a while. Also thank you for the compliments

As far as sitting in the water is is undoubtedly stern heavy given the additional weight of the 4stroke along with a jack plate. The scuppers are just in the water at rest with me (210lbs) at the helm full of fuel and a 54qt igloo cooler under the leaning post filled. Boat is much happier with a loaded fishbox up front. I have left the boat docked overnight and while I was nervous, all was well. I just moved the cooler from the leaning post to the front casting deck allowing the scuppers to do their job out of the water. I would say the most worrisome point is unloading off the trailer. If the boat is backed in too fast or an excessively steep ramp, water will come over the back right as its floating off the trailer.

I have been kicking around the idea of adding a trolling motor to the front but have been torn on how and where to mount batteries. I haven't pulled the trigger but I had the idea of putting batteries under the casting deck with a hatch cut into the deck. Furthermore adding a compartment over the front deck just in front of the fishbox and flush with the top of the gunnels making a flush casting deck across the front while also providing an additional storage compartment up front. This would absolutely add weight to the front offsetting the engine weight. Thoughts from some more people would be much appreciated