Corpusfishing.com

Johninaustin · Full Grown Flour Bluffian Joined: 03 Jun 2007 Posts: 1118

I'm looking at putting a new motor on my Whaler skiff. It has a 2001 40hp Honda on it now and the engine runs fine, but it's age is starting to worry me, esp on nearshore trips or in the shipping channel.

Right now the motor will push the boat with two people at 26mph. Decent, but i'd like to be able to cover distances a little bit faster.

I realize this has a lot to do with how I prop it, but how much of a speed increase would I get with a 60 hp 4 stroke?

I don't like the idea of going higher than a 60, you get into bigger blocks and more weight. Right now the boat with the engine raised floats in 8" of water and I'd like to keep that advantage. Max rating for the boat is 90hp.

BayFly · Posted: Mon Feb 12, 2018 7:37 pm Post subject:

You need to be concerned about the weight of the engine you chose, but with a 20 hp increase you will probably realize moderate speed increase on top, and a better mid-range rpm with the right prop. I have no knowledge of what 75 hp engines are available today, but I would encourage you to consider it, especially if the weight is acceptable. Also, a little better description of what hull you have would help someone advise you more specifically. Good luck on your upgrade.

RobertO · Joined: 13 Feb 2018 Posts: 4 Location: Corpus

A quick search of post history seems to indicate that you are repowering a 17 ft. whaler. I would assume it is a Montauk model. Not sure what you intend to invest in a new engine but you might want to review the specs on a F70 Yamaha. The lightest 70 four stroke available presently,it tips the scales at just over 250lbs and would run you just south of 10 bills with controls. I'm guessing that you could prop it with a 15 in. pitch and expect around 32-34 mph at wide open throttle with an average load.

Clay · Joined: 09 Jul 2013 Posts: 3 Location: San Antonio

Discussion about repower on Whaler forum.

http://continuouswave.com/forum/viewtopic.php?f=7&t=3075

Johninaustin · Full Grown Flour Bluffian Joined: 03 Jun 2007 Posts: 1118

RobertO · Joined: 13 Feb 2018 Posts: 4 Location: Corpus

I've got a 95' Whaler Dauntless 15 rigged with the original 70 two stroke which pushes it nicely. My hull weighs 850 , so I can see where a 60 on yours may be sufficient. Good luck in your search or whatever you decide to do. But yea, those new Yammies are expensive little muthas.

landlocked beachbum · Posted: Wed Feb 14, 2018 9:58 am Post subject:

As with all things, you get what you pay for, and the up front price must be amortized over the useful life of the product in question..... in other words, value for the dollars spent.

There is a VERY high end boat/yacht retailer in Destin called The Ships Chandlery. I stopped in there years ago to look at the new Pathfinders, which is the class of boats they offer among a few other brands. There were ONLY Yamahas on every OB boat on the lot. I asked the sales guy why, and he said "We've tried them all in the past, these don't break"!!! Shocked

Of course, any motor may eventually have problems, but his point was that they are simply more dependable than any other brand of outboard. Interestingly, Yamaha is the brand of outboard on the transoms of maybe 80-85% of the boats I see down there, and buddy boy, one sees a LOT of boats on any given summer day in Destin Harbor, in the pass and outside! There is also a Bas Pro there, and they of course sell only Mercury. Most of the boats with Mercury outboards just happen to have come from BPS.

Says a lot to me! Wink

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Dave

"The difference between genius and stupidity is that genius has it's limits". Albert Einstein