4 stroke v. 2 stroke

[trasbeck]

I am considering purchase of either a 2003 model boat equipped with a 115 hp. Johnson 2-stroke or the same hull except a 2004 model with a 115 Yamaha 4 stroke. Price difference is $4500. I realize some of the advantages of the 4 cycle, but the bucks make the 2 cycle very attractive. Would anyone care to guess what the difference in fuel consumption might be? These are 19 ft. boats.<br />Any other thoughts? This boat will only get used about six months per year.

 

[DJ]

Re: 4 stroke v. 2 stroke

You can buy a lot of fuel for $4,500.00<br /><br />The 4S will probably get somewhere around 20-30% better fuel economy-overall. Even more, if you idle a lot.<br /><br />The 4S will be easier to live with: quieter, starts easier, etc.<br /><br />As for durability, the jury's still out on that one.

 

[Forktail]

Re: 4 stroke v. 2 stroke

They're either giving the Johnson away or charging an arm and leg for the Yamaha. My guess is they want to get rid of the Johnson.<br /><br />My last Yamaha F115 cost $7500 with prop and controls. That would put the Johnson 115 at $3000.<br /><br />So it really depends on your use. But IMO, the F115 is a superior outboard, and that particular model is probably one of the best outboards made today. My F115's get at least 30-40% better fuel useage than my 2-stroke 115's. And I always get more useful life, better durability and reliability, and a better resale out of my 4-strokes. Plus they are just more of a pleasure to own. This is in a commercial environment. So do you wan't the VW, or the Lexus?

 

[snohomishbaddawg]

Re: 4 stroke v. 2 stroke

Got to agree with forktail, 4500 difference is an awful lot! I have had 2 strokes and now have a 4 stroke. I wouldn't change back to a 2 stroke.

 

[bossee]

Re: 4 stroke v. 2 stroke

Hi<br />Some info about fuel consumtion etc on my boat with Yamaha F115 (I have a 2003 model).<br />From a boat magazine where they tested the boat I have. You have to convert to gallons if You need, to understand the fuel consumtion better perhaps. I live in Sweden where we use only metric, liters.<br />Note the speed is in knots, "nautical miles" per hour (not "miles" per hour)<br /><br />Yamaha F115 <br />Diameter prop in test 19" (Yamaha orginal black, steel)<br />Max RPM in test 5.900 <br />Boat Yamarin 5820, 19'(5.7 meter) DC/Bowrider<br /><br />Speed in knots: <br />max rpm 39,0 <br />minus 500 rpm 35,6 <br />minus 1.000 rmp 32,0 <br />minus 1.500 rpm 27,4 <br /><br />Liter/hour <br />max rpm 38,6 <br />minus 500 rpm 28,8 <br />minus 1.000 rpm 23,8 <br />minus 1.500 rpm 18,5 <br /><br />Liter/nautical mile <br />max rpm 0,99 <br />minus 500 rpm 0,81 <br />minus 1.000 rpm 0,74 <br />minus 1.500 rpm 0,68 <br /><br />Decibel (at drivers place) <br />max rpm 84 <br />minus 500 rpm 83 <br />minus 1.000 rpm 81 <br />minus 1.500 rpm 80<br /><br />I do not think You will regret to buy a Yamaha F115 but if economy do not permit that You will probably be happy with the 2-stroke also.