Mark Tindal
New Member
- Oct 11, 2018
- 22
- Boat Info
- Sea Ray - 220DA Sundancer
- Engines
- Mercruiser Alpha One 5.0 V8
Hey all,
I just took a long weekend away with my 1990 220DA Sundancer. 2 PAX, a tender and some basic food and supplies and a couple of duvets. She has the 5.0L Mercruiser, Alpha One leg and a 19P prop.
I reckon I burned about 18 gallon an hour on the two hour stretch across the Atlantic from Penzance to Scilly Isles. Why? Because for most of the journey she needed me to keep the throttle either full on or maybe a bit back from full. I mess with my engine trim after I get on plane and get about 21 or 22 mph at about 3750 rpm which is about full throttle. If I then ease back the throttle to 3500 rpm she'll stay out of the water at 16mph-18mph but often just dips back in and I need to push WOT and start again. Very annoying!
A bit of help in understanding the rpm to prop pitch to plane expectations and speed would really help me understand what I should be expecting and if it's not a prop thing, maybe I need a tune up or is it a servicing thing.
The underside and prop is clean and clear. I. do get a belt squealing for the first few minutes after startup. One of the trim tabs doesn't fully retract (about 2 inches) so I even. out with the other one until I get her out the water. Engine sounds good expect I hear a very high pitched squeal, almost inaudible. Can't think of anything else.
Any and all constructive comments really appreciated.
I just took a long weekend away with my 1990 220DA Sundancer. 2 PAX, a tender and some basic food and supplies and a couple of duvets. She has the 5.0L Mercruiser, Alpha One leg and a 19P prop.
I reckon I burned about 18 gallon an hour on the two hour stretch across the Atlantic from Penzance to Scilly Isles. Why? Because for most of the journey she needed me to keep the throttle either full on or maybe a bit back from full. I mess with my engine trim after I get on plane and get about 21 or 22 mph at about 3750 rpm which is about full throttle. If I then ease back the throttle to 3500 rpm she'll stay out of the water at 16mph-18mph but often just dips back in and I need to push WOT and start again. Very annoying!
A bit of help in understanding the rpm to prop pitch to plane expectations and speed would really help me understand what I should be expecting and if it's not a prop thing, maybe I need a tune up or is it a servicing thing.
The underside and prop is clean and clear. I. do get a belt squealing for the first few minutes after startup. One of the trim tabs doesn't fully retract (about 2 inches) so I even. out with the other one until I get her out the water. Engine sounds good expect I hear a very high pitched squeal, almost inaudible. Can't think of anything else.
Any and all constructive comments really appreciated.