most powerful 10hp

[ruffed]

I'm looking for a 10 horse for a fishing boat. Of all the manufacturers which 9-8 -10 is the fastest most powerful. Have there been any online comparisons?<br />I'd prefer a 4 stroke.<br /><br />Thanks <br /><br />Henry

 

[cobra 3.0]

Re: most powerful 10hp

They're all pretty much the same, but two stokes are faster on take off. <br /><br />Now if you were thinking of a two stroke 15 (generally same size as the 9.9 two stroke), now your talking about a good 5-7 miles an hour faster.

 

[joaklay]

Re: most powerful 10hp

Could get a ~80's vintage Johnson/Evinrude 9.9 and replace its carb with a 15hp carb thus making a 15hp, or so people claim.<br /> I see people selling those carbs claiming that on Ebay often.<br /> Not sure of the exact years either but they were made for quite a while.

 

[Mod2]

Re: most powerful 10hp

To Outboard Discussion - Non Repair.

 

[JB]

Re: most powerful 10hp

Well, it depends. <br /><br />9.9 Clydesdales are a lot more powerful than 9.9 Thoroughbreds but the Thoroughbreds are a lot faster.<br /><br />You can try every 9.9 on the market, 2 or 4 stroke, and the correct rigging and prop will make more difference than the brand/model of engine.<br /><br />Cobra must be talking about a racing shingle to get 5-7 mph more with a 15.<br /><br />The 9.9 and 15 hp engines built on the same block differ a lot more than just a carb. Putting one big link in a chain does not make a stronger chain.

 

[dajohnson53]

Re: most powerful 10hp

The fastest 10 horse is the one that you can set on 11 (lame joke - have you seen "this is spinal tap"?).

 

[cobra 3.0]

Re: most powerful 10hp

JB, I guess it's kind of a shingle...a 130lb 13.5 ft. aluminum boat. With two kids and myself 25mph. Alone 2-3 mph faster depending on the size of the boater.

 

[JB]

Re: most powerful 10hp

Yes, Cobra.<br /><br />If a boat/load falls just where a 9.9 wont fully plane it and a 15 will there will be a large difference in WOT speed.<br /><br />My point is that the OMC pair, at least, have only the smallest difference in torque at any given rpm except top end, where the 15 continues to rev and the 9.9 flattens out. That, of course, only happens when the load allows the higher revs.

 

[marinemech1]

Re: most powerful 10hp

a 2 stroke will perform better than a 4stroke<br />difference in top speed will be small if any<br />go with the manufacture ie merc johnson that can give you the best service

 

[WillyBWright]

Re: most powerful 10hp

The strongest 9.9s are the ones that have been converted to 15s on the sly. <br /><br />Not that I'm condoning that sort of behavior. <br /><br />Look for the versions that have the same displacement as the 15s. Some have the same displacement as the 8s. You want cubes!

 

[walleyehed]

Re: most powerful 10hp

The strongest 9.9's are the 15's with the 9.9 hood