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Boston whaler montauk 17 max engine
Jorden Dovianus	#1  Posted on 05/07/13 - 8:25 AM
Member Posts: 5 Comments: 0 Joined: 04/06/13	Dear Whaler fans, I own a 1980 Boston whaler Montauk 17ft and I was thinking about a 140 Yamaha V4 engine in stead of the 85 Yamaha I have now. I have seen people put 300HP behind the boat but do you think 140 is possible? Thanks for the comment.....
Tom W Clark	#2  Posted on 05/07/13 - 8:39 AM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	The Montauk is rated for a maximum of 100 HP. I have seen this hull powered with as large a motor as a 175 HP V-6. I doubt anybody have ever put a 300 on one. 140 HP? I wouldn't, but it has been done. Not particularly unusual.
CES	#3  Posted on 05/07/13 - 8:42 AM
Member Personal Page Photo Albums Project Albums Posts: 2681 Comments: 7 Joined: 04/27/07	A 300???? I'd like to see a picture of that happening. Cliff 1966 13' Sport with a 1993 40hp Yamaha 2 Smoker
Barry Bicknell	#4  Posted on 05/07/13 - 8:46 AM
Member Posts: 28 Comments: 0 Joined: 05/08/12	Classic 17 Montauk , Yes, with a 300 HP http://www.youtube.com/watch?v=Z2Fbe7...2Fbe7UrLiQ Go for it; whatever floats (flips) your boat! Edited by Tom W Clark on 05/07/13 - 9:01 AM -Barnacle-
Windknotz	#5  Posted on 05/07/13 - 8:59 AM
Member Posts: 9 Comments: 0 Joined: 01/28/12	I hava a Yamaha F115 on the back of my Montauk, and it gives me all I'll ever need. I would think a 140 would be scary if not set up right.
Tom W Clark	#6  Posted on 05/07/13 - 9:00 AM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	That's a 300 decal all right, but the only 300 HP two stroke Yamaha ever made as the 300 HPDI. The Montauk takes a 20" shaft length motor, just like the motor in the video. The 300 HPDI was made in only one shaft length: 25"
CES	#7  Posted on 05/07/13 - 9:09 AM
Member Personal Page Photo Albums Project Albums Posts: 2681 Comments: 7 Joined: 04/27/07	I'm with Tom on this one.....anyone can buy a set of Decals and stick 'em on there and call it whatever they want too. I'm calling foul on this one. Cliff 1966 13' Sport with a 1993 40hp Yamaha 2 Smoker
wing15601	#8  Posted on 05/07/13 - 9:25 AM
Member Posts: 699 Comments: 0 Joined: 07/14/12	And the decal is kind of off center. I winter in Ft. Myers and summer in St. Joseph, Michigan. It’s now about 12 years since I’ve joined this group. I gave my 1972 whaler to my daughter and sold the 17’. Bought an O’Day 28 sailboat and sailed on Lake Michigan. Yesterday I bought a 2005 130 Sport.
Barry Bicknell	#9  Posted on 05/07/13 - 9:25 AM
Member Posts: 28 Comments: 0 Joined: 05/08/12	If this is not a 300 HPDI Yamaha ((?), then what cowling is that where the 300 HP decal was placed over....looks like a HPDI cowling to me. Also, take a second look at the shaft specs for the Yamaha 300 HPDI showing a shaft length of 20" ? It could all be a hoax, maybe? http://www.yamahaoutboards.com/outboards/2-Stroke-HPDI/specifications Back to Jordan's question as to a 140HP V4 mounted on his 17' BW Montauk, it's not rated for over 100 HP, insurance will be a tough placement, it is Not necessary, BUT, it's been done! Please be careful of yourself and other boaters! Edited by Barry Bicknell on 05/07/13 - 9:35 AM -Barnacle-
EJO	#10  Posted on 05/07/13 - 9:56 AM
Member Personal Page Posts: 669 Comments: 6 Joined: 11/25/12	Hey I belive these crazy Dutchman. They show once that they are going 52 mph but he mentioned he made it to 62 mph. While filming the helmsman does mention that he has a lot of throttle left and he can't use it as the boat rolls (see different thread started by Duf) and it really started to porpoise. They were also excited as how easy it was to get up on plane without much throttle. I can see maybe a 10-20% over power based on weight (i.e. an 115HP) but the 140hp asked about or in the case of the youtube vid 300hp are crazy dangerous and only good for drag racing. Skipper E-J m/v "Clumsy Cleat" a 2008 Montauk 150
Tom W Clark	#11  Posted on 05/07/13 - 9:58 AM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	...take a second look at the shaft specs for the Yamaha 300 HPDI showing a shaft length of 20"? I have. It could all be a hoax, maybe? Could be.
Jorden Dovianus	#12  Posted on 05/07/13 - 1:26 PM
Member Posts: 5 Comments: 0 Joined: 04/06/13	Thanks for all the comments guys! So I think I would have to stick with max 115hp! Just for safety! Haha! I dont think the 300 is a hoax! Dutch people are crazy!
Joe Kriz	#13  Posted on 05/07/13 - 1:40 PM
Site Owner Personal Page Personal Album Photo Albums Project Albums Posts: 11447 Comments: 452 Joined: 03/18/05	We have most all the Boston Whaler specifications in the link on the left sidebar, "Whaler Models and Info" http://www.whalercentral.com/userphot...owstart=20
contender250	#14  Posted on 05/07/13 - 1:55 PM
Member Posts: 363 Comments: 0 Joined: 10/09/11	Jorden; I have an older 1975 16'7" Boston Whaler, I have a 1985 140 Evinrude Looper that I purchase new and installed it on the whaler. I just redid the Whaler last year for the 1st time. I have own this boat since it was 6 months old. The boat handles very well I usually run around at 1/2 the throttle, I have a custom 34 gallon fuel tank . I did away with the VRO and mix my oil and gas (NEVER A PROBLEM) If this engine ever blows I will be replacing it with the same thing. I have never question or have been sorry for the 140 and would do it again. Best engine I have ever owned also....Good luck
Snook master	#15  Posted on 05/07/13 - 2:11 PM
Member Posts: 4 Comments: 0 Joined: 08/20/12	Windknotz wrote: I hava a Yamaha F115 on the back of my Montauk, and it gives me all I'll ever need. I would think a 140 would be scary if not set up right. What's your top speed and fuel burn at cruise with that F115? I have a 2003 Yamaha 130hp on my Montauk and was thinking about selling my engine and going with a F90 or a F115.
Joe Kriz	#16  Posted on 05/07/13 - 2:22 PM
Site Owner Personal Page Personal Album Photo Albums Project Albums Posts: 11447 Comments: 452 Joined: 03/18/05	Yamaha F115 = 408 lbs http://www.whalercentral.com/articles...ticle_id=6 Yamaha F90 = 366 lbs http://www.whalercentral.com/articles...ticle_id=5 Yamaha Offshore F300 = 562 lbs for 25 inch shaft which will not work on the Montauk http://www.yamahaoutboards.com/outboa...ifications
Jeff	#17  Posted on 05/07/13 - 2:30 PM
Member Posts: 1987 Comments: 34 Joined: 04/02/05	[b]Tom W Clark wrote: The Montauk takes a 20" shaft length motor, just like the motor in the video. The 300 HPDI was made in only one shaft length: 25" Are you sure the motor in the video is a 20" shaft? With the huge spray coming from the motor and the deep hole it is creating in the wake, it could be a 25" shaft motor. For the good of all viewers, the video's poster should done a been job documenting and detailing the set up.....but you get what you pay for, and youtube is free. Either way, it sure looks like the pilot is fighting a hard "Whaler Roll" with the hull keeling over to port.... Edited by Jeff on 05/07/13 - 2:40 PM 1993 23' Walkaround Whaler Drive
Jorden Dovianus	#18  Posted on 05/07/13 - 2:46 PM
Member Posts: 5 Comments: 0 Joined: 04/06/13	Ooooh... I'm still confused! I dont want to be dissapointed when i install the 115 so still thinking about the 140 v4.... The 85 Yamaha only runs 50km per hour! To slow for the Montauk....
DennisVollrath	#19  Posted on 05/07/13 - 2:54 PM
Member Personal Page Posts: 298 Comments: 0 Joined: 08/29/10	Jorden, Something else is not right if an 85hp motor is only pushing your boat 50km/h. A 70hp gets my Montauk to 57km/h. You might want to dig a bit further. Dennis 1985 Outrage 18 with Suzuki DF140A
jamesgt727	#20  Posted on 05/07/13 - 7:50 PM
Member Personal Page Project Albums Posts: 360 Comments: 0 Joined: 01/17/11	If performance is your concern, you should consider a Mercury 115 Pro XS for that hull. It's a two stroke, but it's lighter and its a factory hot rod motor thats rated at 123 HP I think. I saw that video, peak speed on that cell showed 82 Km/h (51 mph)? I would have expected 169 km/h with the right prop.