What outboard would be the best.

[flick122]

I have a boat that's made in Canada it's pretty much the same exact thing as a carolina skiff with a semi vee and it's 15.5 foot long. I'm looking to maybe repower it. Right now I have a 1994 30 hp johnson on it and it pushes it around 28 wot with just myself. I was looking into a 40 hp honda or a yamaha or even a etec. Would a 30 hp etec be similar to a 40 hp 4 stroke. Would the 30 etec or a 30 4 stoke be more power than the motor that's I have on there now. I would like some input on this thankyou.

 

[ondarvr]

Your 30 will move it just as good or better than a current 30.

What does the plate on the hull say the max HP for your boat is?

 

[flick122]

It dosnt have a plate on it where it tells you the max hp or the weight capacity. I'm playing a gessing game .

 

[Ike-110722]

As Ondarvr said, look at the label. Do not power your boat with more than is what is on the label. Canadian HP standards (or KWs) are the same as the US. In addition the weight of the OB determines the safe loading weight and amount of flotation built into the boat. On top of that, in some states (Not all) you can be cited for exceeding the HP rating. If the rating is higher than 30 hp go with what is on the label as long as you feel comfortable with it. If you put on a 40 the boat will go a little faster, not much maybe 2 or 3 mph, but it will change the handling especially if the engine weighs a lot more than the thirty. It will also burn more fuel. Be aware that most new engines today are 4 strokes. There are a few 2 strokes left on the market but if you really want a two stroke you may have to buy a used engine. also, on average 4 strokes weigh more than two strokes.

 

[Ike-110722]

Sorry I posted before seeing your post saying it doesn't have the required label.

Measure the centerline length of the boat. Measure the maximum transom width. Multiple the two numbers. That gives you a factor. Look at the table on http://newboatbuilders.com/pages/hp.html The hp depends on the length, width, type of steering, and type of hull and transom height Since yours is a vee hull it does not fit in the flat bottom hard chine category. Transom height of 19 inches or more is consider 20 inch. Less than19 is a short shaft and considerably lowers the rated HP.

 

[flick122]

Ok I know it's a 20 inch transom bc I have a long shaft motor on it and it is a semi vee just like some of the Carolina skiffs and it's as wide as a 14 foot aluminum polar craft and it's a tiller steer

 

[flick122]

Whay if I want to keep a 30 hp will a 30 hp 4 stoke be as much power as my 2 stroke

 

[ondarvr]

4 strokes are normally heavier and not as peppy as a two stroke, so in comparison they can be a little sluggish getting on plane.

 

[Sea Rider]

4 strokes OB's are said to be slow on hole shot compaared to same 2 strokes HP, but can get even while at full hammer down. You can always maximize a prop to run at top wot rpm stated for that OB and improve performance than with factory delivered prop. Must check wot rpm with an induction tach before going for a prop max..

Happy Boating

 

[flick122]

Just as long I don't lose top end I can out a prop on it to make it get out of the whole what's your input on wich 30 hp motor honda yamaha ect.

 

[Sea Rider]

You have Honda, Yamaha, Tohatsu, Suzuki, Mercury, Evinrude 30 HP, 4 strokes OB's. I'd guess it's a personal choice, for me Tohatsu as we sell them and go boating with those...

Happy Boating

 

[Ike-110722]

You might want to look under the hood, because a lot of the smaller outboards today are just the same engine with a different brand name on it. For instance my Mercury is a Tohatsu. Find out who made the engine.

 

[flyingscott]

If you don't want to lose speed don't buy the 4 strk. They generally do not have the performance of a 2 strk.

 

[JimS123]

Just as long I don't lose top end I can out a prop on it to make it get out of the whole what's your input on wich 30 hp motor honda yamaha ect.

Be prepared to be disappointed. Any 30HP 4stroke will cause you to lose top speed because its a heavier motor. You asked what's the best motor - its your Johnson!

 

[Sea Rider]

If you compare the performance of a standard factory delivered prop on a 2 strokes OB to same factory delivered prop on same 2 strokes OB model, the lighter weight difference of the 2 strokes will surely make the difference if testing on same 2 equal/same boats. If you go for a less pitch on the 4 strokes will be other story. Once engine has gone through the break in period, you should immediately tach OB to rev around or at max wot rpm range with current application, very few re-pitch along with tach. Takes for granted that factory delivered pitch is a proper one, which in most cases ain't so. 30 Kg more of a 30/4 strokes isn?t a huge weight, it?s a child weight.

If can't get 2 strokes OB?s in your location, what are you going to do ?

Happy Boating

 

[flyingscott]

If you compare the performance of a standard factory delivered prop on a 2 strokes OB to same factory delivered prop on same 2 strokes OB model, the lighter weight difference of the 2 strokes will surely make the difference if testing on same 2 equal/same boats. If you go for a less pitch on the 4 strokes will be other story. Once engine has gone through the break in period, you should immediately tach OB to rev around or at max wot rpm range with current application, very few re-pitch along with tach. Takes for granted that factory delivered pitch is a proper one, which in most cases ain't so. 30 Kg more of a 30/4 strokes isn?t a huge weight, it?s a child weight.

If can't get 2 strokes OB?s in your location, what are you going to do ?

Happy Boating

Let me Clarify this because this statement bothers me.
EVERY outboards power be it 2/4 strk can be maximized by using a tach and the correct prop. Saying the 4 stroke alone will benefit from those changes is misleading because it's not true. If you take 2 of the same boats and a 4 strk and a 2 strk motor set them both up correctly the 2 strk will still win it has been proven time and time again. 30 kilos may only be a childs weight but it's one less child you can take with you or one less battery. Jims123 is absolutely correct your 30 hp Johnson is the best motor for you. The 4 stks are getting closer but they are not there yet

 

[Sea Rider]

So OP plans "racing" against a friend with same boat type, one with a 2 strokes, other with 4 strokes 30 HP OB's both with maximized props to reach max wot range? if ain't so, the comparison is useless for recreational boating. Stay with current Evi 30 HP and boat happily.


Happy Boating