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  Best Engines for Whaler Guardian 19

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Author Topic:   Best Engines for Whaler Guardian 19
tmuenster posted 10-10-2005 01:41 PM ET (US)   Profile for tmuenster   Send Email to tmuenster  
I am interested in some recommendations to power a Whaler 19’ Guardian. The specs say it is rated for 150hp max and a max engine weight of 470 lbs. My best option would be twin 75hp, four stroke, 235 lbs motors. However, they do not exist. I like the idea of having twins for better fuel economy and extra reliability. I could use twin 60 hp in a four stroke, or a single 150 hp four stroke. Another option would be twin Yamaha 70 hp two strokes. What kind of speed do you think twin 70’s would produce? Are the four strokes really better? Of course these options all fall inside the limits set by the manufacturer.

Could this boat handle more weight and horsepower?

Looking forward to your opinions,
Tom

Buckda posted 10-10-2005 05:31 PM ET (US)     Profile for Buckda  Send Email to Buckda     
Tom -
What year is the boat? I believe this is the same hull as the "classic" 18' Outrage with the notched transom, correct?

If so, do a search for threads about performance and repowering these hulls. LHG has twin 115 HP Mercury outboards on his '86 for total transom weight of 612 lbs, and those motors are on 10 inch setback brackets. He also has his battery in the stern well. The hull can handle the weight, although I believe that in rough water, Larry's might benefit from trim-tabs because of all that weight (pure speculation). In normal conditions, the boat is a rocket, and behaves quite well.

I'm facing a repower scenario on my 18 soon. I've been putting it off for as long as I can and hope to perhaps even eek another season out of my current motor for next year, but under consideration in the twin HP category were the E-Tec 90 HP and the 90 HP Optimax. There's quite a long thread from early this year or last fall about this that was started by me. I'll try to find it and link it here, but if you do a search you may find it faster.


Good luck.

Dave

Teak Oil posted 10-11-2005 08:02 PM ET (US)     Profile for Teak Oil  Send Email to Teak Oil     
Twin Yamaha 90 2 strokes would be the lightest, fastest, cheapest option, though not necessarily the cleanist.

Twin 75 or 90 E-Tecs would probably be my choice.

tmuenster posted 10-11-2005 10:22 PM ET (US)     Profile for tmuenster  Send Email to tmuenster     
Buckda and Teak Oil,

Thank you very much for your advice. I am concerned about putting too much weight on the stern and affecting the performance overall. The boat is rated for 470 lbs and twin 90 E-Tecs would 640 lbs for an extra 170 lbs back there. The E-Tec 75 and 90 both weigh the same so I would opt for the larger hp. Since this is my first experience with a Whaler, I do not know if the bigger motors would be a problem. I am willing to spend the money to get it right but I don’t want to be wasteful either.

Buckda, I did a search for the thread you mentioned in your post and found the clips of you and your 15. Wow, I am proud to tip my hat to a man who knows extreme boating. Back in my Navy days I used to get some air under my RIB but that was 24’. Bravo Zulu!

I plan to use the boat in some rivers in addition to lakes. As you know, river running requires a shallow draft. I don’t want to be bumping the bottom with some heavy motors. I also considered jack plates but those would add pounds as well.

There was a post about some problems with a 60 E-Tec on this forum. Does anyone have experience with the 90 hp E-Tec?

Thanks again and I am looking forward to learning more about Boston Whalers and the people who own them. Everyone who I have talked to about their BWs seem very nice. I used to ride BMW motorcycles and got the same feeling from that group.

Tom

bigjohn1 posted 10-12-2005 08:36 AM ET (US)     Profile for bigjohn1  Send Email to bigjohn1     
I have seen perhaps 2-3 first-hand reports over on the Hull Truth forum about the 90 E-tec and those reports were all very favorable by their owners. I have not seen any reports on the 90's where they have been run for any length of time and I guess that might be due to their being relatively new. Still, they sound like great engines for a dual outboard setup in your case.
Joe Kriz posted 10-12-2005 01:38 PM ET (US)     Profile for Joe Kriz  Send Email to Joe Kriz     
Tom,

Here are today's engine choices when selecting a single engine:

http://users.sisqtel.net/jkriz/drawings/Outrage18-QRG.html

It is my opinion (and many others) that twins are only necessary when venturing far offshore...
Other than that, a single main engine and a kicker is the best choice.

Twins will not give you better fuel economy or performance.. No Way..
Lots of discussion in other threads on this topic.

Good Luck with your decision...

tmuenster posted 10-12-2005 06:02 PM ET (US)     Profile for tmuenster  Send Email to tmuenster     
Joe,

Thank you very much for your post and link to your Outrage 18 power page. Lots of great info on your site.

Your Outrage is a fine looking boat. The pictures of your teak project are super. It didn’t look too bad when you started but it really looks sharp now. I could not get your QuickTime movies to download. Do I need any special software to view the files?

Thanks again for the info,
Tom

Joe Kriz posted 10-12-2005 06:35 PM ET (US)     Profile for Joe Kriz  Send Email to Joe Kriz     
Tom,

Thanks for the kind words...

You may need to download Quicktime for Windows 2000 or XP if that is the platform you are using. They use to have it for Win 95 and 98 but I can't seem to find it at this time...


You can download Quicktime for FREE here:

http://www.apple.com/quicktime/download/win.html

Buckda posted 03-07-2006 07:00 PM ET (US)     Profile for Buckda  Send Email to Buckda     
Sorry to drag up an older thread, but I was curious if Tom ever re-powered his 18.

I hope to have some performance information soon on the boat rigged with twin E-TEC 90 HP motors.

Dave

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