1150 tower of power problems

[jimmbo]

Looking at your boat on the video, you might be better off with a 17 inch prop. Also, some unasked for advice, your boat is sitting too far back on the trailer

 

[ippielb]

Do you have an accurate tachometer? What are your RPMs at WOT?

No tachometer at all.

 

[ippielb]

Looking at your boat on the video, you might be better off with a 17 inch prop. Also, some unasked for advice, your boat is sitting too far back on the trailer

Why do you think I should get 17 pitch? My prop is really banged up so it is not performing anywhere near like it should.

 

[444]

Replace your primer bulb if you haven't already. Replace all rubber fuel lines and check your metal fuel lines for kinks. When you rebuild the carbs, did you do a link and sync after? If not, do it.

 

[jimmbo]

Because of 30+years of seeing crank rated 115s on various boats, a 17 was the one that 95 out of 100 times worked best for boats like yours

 

[ippielb]

Because of 30+years of seeing crank rated 115s on various boats, a 17 was the one that 95 out of 100 times worked best for boats like yours

Did it work the motor less at top speed to gain more top end? Or will it take away top speed? I was wanting to try and get 50mph.

 

[ippielb]

Replace your primer bulb if you haven't already. Replace all rubber fuel lines and check your metal fuel lines for kinks. When you rebuild the carbs, did you do a link and sync after? If not, do it.

I checked the fuel lines, replaced the primer, and did not do a link and sync after, I thought if I rebuilt them I wouldn't have to. I'll look into that link and sync.

One thing I find weird. Before when I had a leaking fuel line, when I squeezed the primer, I always felt there was fuel in it. But now all my fuel lines are tight, when I squeeze the primer when I launch the boat to try and start it up, it takes FOR EVER to get any fuel to the primer. Before there was fuel in the primer now it's like it all gets siphoned back into the tank and I have to try and get it started all the way again.

 

[jimmbo]

You want a 13 km/hr(8 mph) increase in speed? Well then, bolt on an engine with 40 more horsepower.

Dropping from a 19 to a 17 will raise your rpms about 400. Right now I suspect you are running between 5000 - 5100. Your holeshot will improve, your top speed will be about the same give or take 1 mph. If you were to try a 21, your boat will take longer to plane, the engine will be running too far below the recommended rpm range, and the boat will probably go slower. Later it will die a horrible twitching death and then you can buy a V6 135 and get 55 mph. I know that is less of an increase in hp than the last paragraph, but your engine is crank rated and the 135 would be prop rated

 

[ippielb]

You want a 13 km/hr(8 mph) increase in speed? Well then, bolt on an engine with 40 more horsepower.

From everything I am told, and knowing someone with an identical boat and motor with a couple different things in it and they are getting 52mph on gps, I think it's possible for me to get damn near close to 50. I can't stress enough how bad my prop is. Plus I feel I'm under revving, and the prop is slowing me down. And I can also get a hydrofoil to give me a little more.

I also feel your replying to my thread in a negative point of view, I don't know what I did to get these responses, but I asked a simple question if the motor will work less and I gain rpm going from a 19" pitch to a 17" pitch, or if it will smooth out my motor operation and make it a more pleasurable drive.

 

[jimmbo]

If you had a prop rated 115, mounted 1 1/2 to 2 inches higher on the transom, were running a 19 or 20 inch high performance prop with lots of rake and cup and your engine was able to turn about 5600 - 5700, then then you would see 50 mph. You have a crank rated 115, which is not as powerful as the prop rated model. It is not going to have enough torque to swing that type of prop at the rpm needed.

 

[444]

I checked the fuel lines, replaced the primer, and did not do a link and sync after, I thought if I rebuilt them I wouldn't have to. I'll look into that link and sync.

Dead wrong. Any time you remove a carb you need to do a link and sync. My boat wouldn't even get out of the water after I had the carbs off because I didn't do the link and sync.

 

[ippielb]

http://www.kijiji.ca/v-boat-parts-tr...tor/1187277748

Would this prop fit on my led of my 1150? If it would fit, would it perform well? An 18 pitch is sounding like a good compromise between what I want and what I should get.

Edit:
Looking on google while posting this, I found my own general answer. Adding a blade loads the motor more, but lowering the pitch may help a bit. In other words I need to get an RPM gauge and get a straight prop to better decide what prop I need.

 

[ippielb]

Dead wrong. Any time you remove a carb you need to do a link and sync. My boat wouldn't even get out of the water after I had the carbs off because I didn't do the link and sync.

That is good to know, I am going to YouTube it right now.

Edit:
https://youtu.be/eSk01fvCbec
I found a really good video on how to link n sync. May try this before I take it out to the lake tomorrow.

 

[Chris1956]

That prop will not fit your motor, as it is the larger diameter (4-3/4") hub. Also, if you want speed, a 4 blade prop is not the way to go.