Determine counter engine

[Yamaha_999]

Hello everybody,

I have problem with my twin Yamaha 200AET, I decide to convert one of them to counter rotation and I search for counter lower unit and never found one but yesterday when I check the model of my engine I saw that one is 200AET and the other one is L200AET which mean it's already counter but I don't know if the lower unit was replaced by clockwise(STD) because the previous owner who I buy the boat from him always keep it with the mechanic without knowing what mechanic do in his boat so, may be the one who work on it replaced it with STD and take the Counter one for his shop or to another customer who want counter lower unit.Now,I want to determine if t's Counter or STD without attached it to the engine because I already have both of them in my home.

 

[Scott Danforth]

first, welcome aboard

second, there is no standard or counter rotating lower. you flip the cable in the controls, one runs in FWD, one runs in reverse and you put a RH prop on it.

 

[boscoe99]

What is the ID for the motor?

 

[boscoe99]

What is the ID for the motor? I am in the USA. There is no 200AET model offered here in the US. Never has been. If you give us the ID we can get to an equivalent USA model Yamaha.

 

[boscoe99]

first, welcome aboard

second, there is no standard or counter rotating lower. you flip the cable in the controls, one runs in FWD, one runs in reverse and you put a RH prop on it.

You might want to withdraw your comments about there being no standard or counter rotating lower unit on a Yamaha.

 

[Yamaha_999]

What is the ID for the motor?

Yes, it's Yamaha international 1988 200AET(6G6) and the other one is 1988 L200AET(6G6)
I notice under the anode which fit in one of them R letter stamp on it other one nothing there

 

[boscoe99]

L200 is the model that would have come with a counter rotating gear case installed. Only difference between the two models. Keep in mind that whatever is on there is anyone's guess. Some folks convert a counter to a regular and a regular to a counter simply by swapping the gear case.

 

[Yamaha_999]

I know about the swapping the gear case but I just want to know if it's counter without run the outboard engine.

thank you

 

[boscoe99]

Shift it into forward gear. Turn the drive shaft clock wise when looking down. If the propeller shaft turns clock wise when looking from behind it it a regular gear case. If the propeller shaft turns counter clock wise when looking from behind it is a counter rotating gear case.

Alternately, take it to a marine mechanic and have him do it for you.

 

[Yamaha_999]

Shift it into forward gear. Turn the drive shaft clock wise when looking down. If the propeller shaft turns clock wise when looking from behind it it a regular gear case. If the propeller shaft turns counter clock wise when looking from behind it is a counter rotating gear case.

Alternately, take it to a marine mechanic and have him do it for you.

Today, I shift the gear in forward and what is happen when I turn the driveshaft in clockwise the propeller shaft turns clockwise when I looking from behind it and this happen for both lower case.

But, I have a question about the lower unit case is there any difference between the counter lower unit case and the regular (STD) one because where I live they sale used empty lower unit case, drive shaft, bearing housing...etc.

So, can I buy regular one lower unit case and fit inside it counter gears ?

thank you boscoe99

 

[boscoe99]

Why not just operate both motors with regular gear cases? Lots of folks do just that.

 

[Yamaha_999]

Because what I heard from sailing mans that it will be faster and the steering will keep straight even if you didn't hold it while the regular one is not. So, what I plan is to fit counter lower unit on the L200AET and keep the regular one as a spare if something happen to the 200AET lower unit in future.

 

[Sea Rider]

Why not just operate both motors with regular gear cases? Lots of folks do just that.

Yep, less hassle. If going as suggested install an hydraulic steering system to make the steering much easier and less stressful on the hand, 2 props rotating CW will tend to veer more the boat towards port side than just one prop. Never mind if already counting with hydraulic steering systems..

Happy Boating​

 

[Bt Doctur]

standard and reverse are two different systems ,same with the cases

 

[boscoe99]

Because what I heard from sailing mans that it will be faster and the steering will keep straight even if you didn't hold it while the regular one is not. So, what I plan is to fit counter lower unit on the L200AET and keep the regular one as a spare if something happen to the 200AET lower unit in future.

Depending upon the boat, what you heard may or may not be true. And if true, it may not be an issue for you. Only way to find out is to see for yourself. If you have two regular gear cases now why not simply try them? If it is unacceptable then try and find a counter rotating gear case or convert yours.

 

[boscoe99]

standard and reverse are two different systems ,same with the cases

Not so in all models. Here is an example where the same gear case casing is used for both the regular rotation model and the counter rotation mode. Only some internal parts are different.

 

[Yamaha_999]

Depending upon the boat, what you heard may or may not be true. And if true, it may not be an issue for you. Only way to find out is to see for yourself. If you have two regular gear cases now why not simply try them? If it is unacceptable then try and find a counter rotating gear case or convert yours.

You are right I will do like what you say. Because my problem with this boat is that it have really high bow up (front of it go up) always and not go fast and I can't see what is front me. So, I directly pulled it out from the water and I notice the engine was too low and the anti-ventilation plate is below the boat bottom now I level them up to be aligned with the bottom of the boat but I still not test it after that.

thank you again