Yamaha 150 4-Stroke Steering

[WillyBWright]

Last month I rigged a new Yamaha 150 EFI 4-stroke to a new boat. It's just like their 115 EFI, only bigger. Everything went well and the steering seemed fine on the trailer. I lake tested it and it took two men and a boy to steer it in either direction. It wasn't any easier left or right. The trim tab was at an angle I'd expect to be close. The boat has a non-feedback single cable. Back on the trailer after the test ride and the steering was as easy as before.<br /><br />Has anyone else experienced this? I mean it's a great motor. Just as impressive as the 115 in every way, but even more so because of the extra ponies. My only gripe is the steering effort. Any input?

 

[rodbolt]

Re: Yamaha 150 4-Stroke Steering

hello<br /> I have had some problems with the anti-feedback steering helms getting very tight with any feed back. is the steering hard both ways while underway?<br /> those helms are expensive but I have replaced 3 this year due to excessive force required for steering

 

[bossee]

Re: Yamaha 150 4-Stroke Steering

Hi,<br />Is it a Teleflex Morse NFB 4.2 steering? It is rated for over 200 hp I belive. I have NFB 4.2 on my boat with Yamaha F115 4-stroke. It is the same type of steering with a F150 on same boat that I have, I have seen it. <br />Strange problem, I have no solution other then maybe it is required som wear in before it will be a little easier to use the steering?

 

[WillyBWright]

Re: Yamaha 150 4-Stroke Steering

I think it's a Teleflex. Boat is gone now and I haven't heard about any complaints by the new owner. The boat steers equally hard in both directions under full power on plane. I really didn't have it out long enough to test it at different speeds. Mostly I was checking the WOT RPMs. It's a pretty average setup with an aluminum prop, but it's a Mercury prop (not that that's likely to have anything to do with it). I hope it improves with use. Otherwise the new owner is going to have some good strong shoulders and upper arms driving it. Damn impressive motor though! If I were looking for a 4-stroke 150 I wouldn't even consider anything else.

 

[PAkev]

Re: Yamaha 150 4-Stroke Steering

I am a happy owner of a F150. I have hydraulic steering but find the trim is very critical for my steering performance.<br /><br />About the alluminum prop.... I was under the impression that you had to use stainless props on 4 strokes over 90hp or else the torque strips the teeth which causes the prop to spin free.<br /><br />Kevin

 

[GradyBob]

Re: Yamaha 150 4-Stroke Steering

I bought my F150 in March of this year. I have hydraulic steering as well. The motor I replaced was a Johnson Ocean Pro and all the steering components are the same. <br /><br />What I notice is low speed steering is kind of off and need to adjust the trim as well and did not have this issue with the Johnson. Maybe it is a low end torque thing. Other than that, the motor now has close to 140 hours on it and we absolutely love it. No problems what so ever.<br /><br />The aluminum prop - hmm, I run with a ss prop. I bought a spare Yammi aluminum prop that fits the hub in case I lose my ss when I run in Florida Keys or in the rivers here with trees. A cheaper aluminum prop is better than no prop to get you home. It would seem Yammi wouldn't make or sell an aluminum prop if it wasn't suitable to use on their motors.

 

[rodbolt]

Re: Yamaha 150 4-Stroke Steering

nope aluminium will work fine. stailess holds up better here due to the suspended sand but even then they wear down I can show you many boats in the 200 hp range with al props.<br /> but they dont have the killer shiney effect on the trailer <br /> good luck and keep posting