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Re: Grady 305 Performance ??? Bayrat I think the large drop is due to the fact that with 19p 3 blade props on this rig are for a light load and perfect ie no bottom paint conditions. I believe what is happening is the effect of bottom slime coat, loading the boat, and props that were already...

Re: Grady 305 Performance ??? Guys I agree the bottom is likely the major culprit. I am going to follow Hoghunters results and try 17pitch with a clean bottom in the spring. I just pulled my sons 17 whaler and with his Black bottom paint the slime growth was very light. I bought the Grady...

Re: Grady 305 Performance ??? Thats a good point as well. Who knows maybe its old gas when I buy it. Jim

Pretty sure they recommended their over priced version of Hydraulic fluid. They have a seastar brand sold at marine stores. I never risked mixing just bit the bullet and bought the seastar stuff. jim

First thing i would do is check the level of fluid at the helm.. If its low it may be a s simple as adding fluid and either re bleeding or simply cranking the wheel full port then full starboard a few times.. Loosen the cap at the helm after going hard over in each direction and you will hear...

Re: Grady 305 Performance ??? Well i pulled the boat for the season and as suspected the bottom was covered with a pretty thick dark brown coat of slime. It came off pretty easily with the power washer. I dont recall ever having that much slime on the bottom. It was almost measurable :<><...

OSEAD Jim 2007 305 Express F250 Yamahas

Re: Grady 305 Performance ??? I put the four blades on ( 15.25 x 16) and here are the numbers I am getting now This is with 140Gallons of fuel, canvas Up, 400lbs people, 20 Gallons water, Generator + 12 gallons fuel, Outriggers, 250lbs gear Calm conditions in the river 7-10mph wind I...

Re: Grady 305 Performance ??? Thanks for the posts and I agree thats it seems to be the 2 things you all have raised. Props and Bottom.. I have 4 blade props that I picked up from another member on the forum.. they are 15.25 x 16 power tech 4 blades. I will post my numbers later today on how...

Re: Grady 305 Performance ??? I checked the forward Bilge and while there is a little water in there it was barely enough to be picked up by the Bilge pump. I dont think thats my issue. I took a closer look at the bottom and its pretty slimed over.. I am leaning towards that being the...

Re: Grady 305 Performance ??? Thanks for the comments guys. I will check the Bow Today and see if thats the culprit.. Jim

Re: Grady 305 Performance ??? Brian We put the boat in around May 15th. It had a fresh bottom coat then but has been in since. Thats about 6 mos.. I am thinking it could be the bottom as well. I only see slime but who know whats on the very bottom. Its so late in my season it wont be long...

Thanks George I guess a few more details would help.. Its a 2007 Grady 305 Express Twin 250hp Yamaha outboards 15.25 x 19 Yamaha Saltwater Series 2 props 3 blade Holds 290 Gallons of Gas ( tested with between 50 -and 125 Gallons) Full Water approx 35 Gallons Diesel generator w 12 Gallons of...

I am looking for another owner of a 305 express I may be able to talk with. I am closing out my first season with the boat and overall we are very very pleased. However I would like to compare notes on the performance numbers you are seeing compared to mine. I was seeing 27 knots/ 31 mph at...