2007 Tohatsu TLDI Prop question

[rushcreekoutdoor]

Hey guys, I need some help. I just bought an '07 115 Tohat TLDI for my new F & F 20/72 Modified-V aluminum boat. The dealer who installed it also put on a CMC "stump-jumper" He put a 21" pitch aluminum and said that it was probably what I need. It is at about 6 hours in the break-in and the book says that I can run it wide open "for short times" If I am in it alone and it is wide open with it trimmed all the way out, I barely break 5K rpms and run about 45 mph. With 4 men in it it won't break 5k rpm and will run about 43 mph. My uncle says that it needs to run 5100-5800 at wide open to keep from damaging the engine.

I put a 19" pitch on it today and it hit 5800 rpm and maxxed out at 34 mph and then something happened to the prop and it acts like it spun out. It would idle but would not open up without revving high.

I am going to buy a ss prop, but which one do I need. There are several advertised on this website on the sale for what looks like good prices, but I hate to buy one that isn't right. Also, I don't really want to give up the speed but I will if it isn't good for the motor.

Can anyone help me???
rushcreekoutdoor

 

[TOHATSU GURU]

Re: 2007 Tohatsu TLDI Prop question

Look at 20" in any brand SS

 

[rushcreekoutdoor]

Re: 2007 Tohatsu TLDI Prop question

Hey Elvin,
Thanks for the help. One of my neighbors is a commercial fisherman and he has a 115 yamaha. He let me try his Solas SS 3 blade 17" prop yesterday. Me, my cousin and my two daughters went out. It tached at 5600+ a little and went 43.8 mph. My cousin has a 21" Ballistic on his Johnson 115. Will it fit on my motor to try? My uncle says the Ballistic shape will pull a few more rpms and speed? Is this right.

Given the performance of this 17", should I go up to 19 or 20 or stick with 17?

rick

 

[JB]

Re: 2007 Tohatsu TLDI Prop question

Moving to the Prop Forum

 

[TOHATSU GURU]

Re: 2007 Tohatsu TLDI Prop question

It doesn't hurt to try everything you can get your hands on that will fit the shaft. Propping is 99% educated guess work. There are tons of different props you can use that will put you in the acceptable RPM range...Trial and error to find the best possible match to your application for any given day of use. Your not looking for perfection. Your looking for a comfort zone of performance where you have the needed hole shot and desired speed at a specific RPM range. In general, people spend too much effort to get that last .05 mph when they get wrapped up in "The Land Of Propellers". Unless your racing or have money to burn just find that comfort zone and enjoy the engine