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13 sport water spray issue
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| John Fyke |
Posted on 03/17/12 - 5:26 PM
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You can angle the engine all you want it won't matter. Just raise the motor all the way up.
John Fyke
Re-Fit or Reef It
1979 15' Sport with Super Sport conversion and 70hp mercury. |
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| Slickityd16t |
Posted on 03/21/12 - 2:34 PM
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The motor is hole 3 now. Took it out today at full throttle it hits the limiter, and sounds like its not getting enough water during any small amount of wake, speed has also dropped off. I think it is way under proped. Right now it has a Solas 12x17. I bought a used SST 11.25X21 hopefully I won't be having the same issues with it as well.
1986 13 Sport - 40 hp Smoker |
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| Geo |
Posted on 03/21/12 - 5:28 PM
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If 3 holes up does not solve the problem, what else can fix this issue? Maybe the hull is warped? Might be time to find another 13 footer?
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| Slickityd16t |
Posted on 03/21/12 - 6:35 PM
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Geo wrote:
If 3 holes up does not solve the problem, what else can fix this issue? Maybe the hull is warped? Might be time to find another 13 footer?
It's not spraying anymore, sorry I forgot to say it. But I have a new set of issues as stated in my previous post.
1986 13 Sport - 40 hp Smoker |
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| Phil T |
Posted on 03/22/12 - 6:26 AM
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Slick -
When you raise the motor, the WOT rpm's increase since there is less drag from the lower unit. Typically, owners report an additional 150 rpm increase for each bolt hole rise.
Every motor has a maximum rpm and a recommended range for WOT. Having to change the prop size is typical after raising the motor.
Prop sizes are not universal across brands. The best thing to do is keep the diameter but change the pitch.
We need to know the WOT rpm and speed (by GPS) to help you determine the correct size. Also noting the load of gear, fuel and passengers is important.
1992 Outrage 17 I
2019 E-TEC 90, Viper 17 2+
2018 Load Rite Elite 18280096VT |
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| Slickityd16t |
Posted on 03/22/12 - 1:53 PM
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Phil T wrote:
Slick -
When you raise the motor, the WOT rpm's increase since there is less drag from the lower unit. Typically, owners report an additional 150 rpm increase for each bolt hole rise.
Every motor has a maximum rpm and a recommended range for WOT. Having to change the prop size is typical after raising the motor.
Prop sizes are not universal across brands. The best thing to do is keep the diameter but change the pitch.
We need to know the WOT rpm and speed (by GPS) to help you determine the correct size. Also noting the load of gear, fuel and passengers is important.
29.1 Mph GPS 6k RPM don't know the rev's when it would cavitate at full throttle
13 Gal of fuel under the middle seat
190 Lbs Driver
50 Lbs of gear
I also have 55-hp carbs, head and boysen reeds waiting to be installed.
The problem is I already have the largest 3 blade prop I can find and it's the solas 12x17
1986 13 Sport - 40 hp Smoker |
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| Slickityd16t |
Posted on 03/22/12 - 5:16 PM
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I also get alot of blowout, turns wake it doesn't take much.
1986 13 Sport - 40 hp Smoker |
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| CES |
Posted on 03/22/12 - 7:09 PM
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It sounds like to me that you need to lower your trim/tilt. Do you have a manual or power trim??
Cliff
1966 13' Sport with a 1993 40hp Yamaha 2 Smoker |
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| Tom W Clark |
Posted on 03/22/12 - 7:20 PM
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Try a 11-3/4" x 17" Stiletto Triad 3.5; it's probably the only propeller made that will tolerate that high of a mounting. If that pitch is not enough, try the 11-3/4" x 19" size.
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| Slickityd16t |
Posted on 03/22/12 - 9:11 PM
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CES wrote:
It sounds like to me that you need to lower your trim/tilt. Do you have a manual or power trim??
Power trim. But remember I moved the lower mounting pin to the 3rd position or most vertical.
1986 13 Sport - 40 hp Smoker |
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| Slickityd16t |
Posted on 03/23/12 - 3:50 PM
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Tom W Clark wrote:
Try a 11-3/4" x 17" Stiletto Triad 3.5; it's probably the only propeller made that will tolerate that high of a mounting. If that pitch is not enough, try the 11-3/4" x 19" size.
If my SST 11.25 x 21 doesn't do the job I will give it a try thanks for the tip Tom.
1986 13 Sport - 40 hp Smoker |
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| Slickityd16t |
Posted on 03/25/12 - 1:36 PM
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Still having massive blowout problems. It's almost as bad with new SST prop. Rpm's are down speed is barely higher. Maybe I should try putting the lower trim mounting pin back to the lowest setting. I don't want to buy another prop if I don't know for sure it will work. I just can't afford it
1986 13 Sport - 40 hp Smoker |
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| Joe Kriz |
Posted on 03/25/12 - 1:46 PM
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If you have power trim and tilt, that manual pin should be in the lowest hole...
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| Bake |
Posted on 03/25/12 - 2:43 PM
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If I were a betting man I would say there is no prop that will not blow out with your motor that high. As Joe mentioned the pin should be at the bottom hole so that you can trim the motor in all the way. But I would say you will find that unless you are running in a straight line all the time any trim at all will blow the prop out when you make turns.
How high is the anti cavatation plate from the bottom of the boat now?
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| Bake |
Posted on 03/25/12 - 3:59 PM
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One more thing I think about is even though I have never had 13 footer my 15 has some spray until I start trimming the motor out. If yours gets better as you trim the motor out while on plane you may want to look into a mounting wedge. The slant on the 13 transom is pretty extreme. You might be able to put a little mounting wedge in there and let the motor back down a hole.
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| Slickityd16t |
Posted on 03/25/12 - 6:02 PM
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Bake wrote:
If I were a betting man I would say there is no prop that will not blow out with your motor that high. As Joe mentioned the pin should be at the bottom hole so that you can trim the motor in all the way. But I would say you will find that unless you are running in a straight line all the time any trim at all will blow the prop out when you make turns.
How high is the anti cavatation plate from the bottom of the boat now?
Its like an inch above right now
1986 13 Sport - 40 hp Smoker |
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| Bake |
Posted on 03/26/12 - 2:39 AM
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thats not so bad your prop should bite at that height.
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| CES |
Posted on 03/26/12 - 3:44 AM
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Joe Kriz wrote:
If you have power trim and tilt, that manual pin should be in the lowest hole...
X2
You should be able to trim your motor down more than you're able to do with the pin in the last (closest to the transom) hole.
Cliff
1966 13' Sport with a 1993 40hp Yamaha 2 Smoker |
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| Slickityd16t |
Posted on 03/26/12 - 11:12 AM
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I moved the pin back down to the stock position hopefully I can go for a test run tomorrow before work.
1986 13 Sport - 40 hp Smoker |
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| Slickityd16t |
Posted on 03/27/12 - 10:54 PM
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Well it doesn't cavitate as bad now. But if I move the trim to try and get the bow out of the water it cavitates again. So I moved the motor to the second hole and the tilt pin to the the middle postion.
1986 13 Sport - 40 hp Smoker |
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