Recent content by Duncan

Hi - No I didn't try to feel the bottom because I really didn't expect that to be the problem. The reason I didn't expect it is because I have kept a boat at this yacht club for 32 years and never had a problem with the bottom ever. Live and learn. I have black Hydrocoat over red so I'll try to...

Hi guys - I had an interesting day on Friday and got to the bottom of this and it was the bottom(!). Many of you suggested this but I didn't suspect it because I never had a problem with bottom growth until now. I essentially discovered that Hydrocoat lasts a long time but not forever. I have...

Good question and a good time to summarize. I've convinced myself that the problem is the hull and not the motors. The primary reason is because the prop slippage had increased greatly from 5% to 35% during WOT testing and the WOT RPM dropped from 5800 to 5000. I did testing when I first put...

Hopefully I will get to weigh my boat tomorrow to put the weight issue to bed one way or the other. I found this photo on Hull Truth which I think is kind of amusing - the owner replaced the waterlogged foam in his Grady with plastic bottles...

Yes - I am using the same props but comparing the prop slip numbers from 8 years ago to what I am getting today. The props haven't changed but the behavior of the boat has. The WOT RPM dropped from 5800 to 5000 and the top speed dropped from 48 MPH to 28 MPH. Hopefully I'll get the boat weighed...

The revs stay steady at 5000 RPM. When I saw the large slip percentage I thought maybe the propeller hubs could be slipping but the RPMs are too steady throughout the operating range for that. (I do have another set of props but the pitch is higher (19" vs 17".) Its on a plane at WOT and going...

I can take a peak at the gas in the filters but I think the gas is getting through just fine since I was burning 40 GPH during the wide open throttle test. Isn't the change is prop-slip percentage from 5% to 36% i smoking gun of sorts? If I think of a car analogy, prop slipping is like tires...

I drained the fuel prior to the 2-year layup and changed the filters afterwards. The fuel in aux tank now is probably 90% this year and 10% last year and the main tank is probably 80% this year and 20% last year. I run one motor off each tank. All the hull stain is from this year. I remove...

I was thinking about this - if the slip percentage was similar, that might indicate a fuel problem or motor problem where the boat is going slower because the motor is turning slower. My slip percentage has changed a lot from 5% to 36% which is a huge change that I think means the motors are...

I forgot to mention that I checked the location of the scuppers and the bottom is 1/2” over the water with the boat lightly loaded and no one on board. Unfortunately I don’t remember where that was previously. I will see if I can find any old photos.

Hi - thanks for all the thoughts. I would love for this to not be waterlogged foam! I just completed a compression test and it looks good. I’m getting: Starboard Port 120. 126. 120. 126 120. 126. 120. 125 120 126. 120. 128 It has kind of an odd symmetry but looks good...

The transom was replaced in 2006 which was 17 years ago. It was done at a Grady dealer so I am hoping they used the Greenwood. I think it might be wet because it still has the aluminum angle piece on the top which I have to re-caulk every spring. I can pull one of the U-bolts to check for sure...

I don't have access to a trailer but am attempting to find a local marina with a lift that will weigh it for me. In the mean time (assuming the compression test is good) I am thinking that I will remove the panel that covers the gas tanks and perhaps remove the smaller of the two tanks to see...

It's got twin 2007 E-tec 225 HP with about 450 hours on them and 150 hours since tune up. I think the motors are fine. They are both burning the same fuel at the same RPM. Losing RPM, speed and burning more fuel is consistent with a heavier load. My buddy just pulled 1800 lbs of waterlogged foam...

Hi - I think my 1995 272 Sailfish may be waterlogged. I sat out the 2020 and 2021 seasons (shrink wrapped) due to Covid and some other issues and when I launched last year I noticed my gas mileage dropped from about 1.4 MPG to 0.9 MPG and it seemed like it might be a little sluggish. I can't...