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Author Topic:   Montauk with 60-HP

Mobjack posted 04-28-2010 02:43 PM ET (US)
Have been looking at different re-power solutions for my MONTAUK for a good long while now. The used outboard market in my area has two products to offer: $500 garbage motors that are one over-rev away from the grave, and one or two year old leftovers that are basically full price. I have a friend who is getting ready to replace his Yamaha 60-HP two-cycle 90 two-cycle. I am seriously considering buying this engine for my MONTAUK. A year ago I would have said that [60-HP] was too small, but now I am desperate for a boat that works.
My previous outboard was a 1985 Johnson 75. It is my perception that the horsepower of this motor was rated at the powerhead. The new yamaha is a 2000 or 2001 model, and I believe its horsepower was rated at the propeller. Based on what I have been told by a couple of mechanics, these two motors should produce similar actual horsepower. Is this accurate? If so, what else could I do with this motor to [increase] its performance? Top speed is not really important for my use, but getting up on the step with a load is important.
What say you, experts?
2manyboats posted 04-28-2010 04:18 PM ET (US)
I have a 60 E-TEC on my Montauk. It replaced an older 70 Evinrude. I lost about 2- to 3-MPH top speed and I went through several propellers until I got one I liked. With five adults on board it is a little slow to plane so I just use my trim a little more. A 60-HP is fine for what we use the boat for. We are in the next-to-highest mounting hole.
contender posted 04-28-2010 05:44 PM ET (US)
You have to ask yourself a couple of questions, A deal is not a deal if everytime you get in the boat you question yourself...Why is you friend selling the 60? sounds like it was to small for his use. Do not let it happen to you. If you plan on pushing a load I would look for a larger engine. I feel that the 60 is the smallest engine that should be on a 16 whaler... To each his own, good luck
Mobjack posted 04-28-2010 07:15 PM ET (US)
[The friend feels as if the 60-HP is not enough] power. He has had [the 60-HP motor] on a 21 or 23 (can't remember which) Jones Brothers Bateau that he uses for duck hunting. I also tend to agree that I would never go any smaller than that. Up until now I don't think I would ever have considered going this small. But when you think about the horsepower, and put [horsepower] in the perspective of it being roughly equivalent in output (and lighter than) my old motor, it certainly makes me think about [deleted figure of speech involving violence which is used to mean "make a decision"].
weekendwarrior posted 04-28-2010 07:53 PM ET (US)
If this helps, I have a 50 Honda on my 17' and it's fine if you're not in a hurry, will even pull a wakeboarder with 4 or 5 adults in the boat, but it isn't a rocket with that much load. With 7 people I get mid 20's top speed (25-ish mph), cruise probably 20-ish. With only a few people top speed is just over 30mph, cruise 25-ish. I expect you would see a tad more than this with 60HP. It planes out just fine with a full boat in smooth water, would probably have trouble in rough seas with a full load, but is plenty of power for a light load in rough water. Me (160#), my brother (200#), a 30gal livewell and extra battery have no trouble at all fishing in the ocean on bumpy days, can't even open it up due to the rough water.
95Outrage17 posted 04-28-2010 08:32 PM ET (US)
Our sailing club's 1987 Montauk has a 2007 Yamaha F60 (4-stroke) on it. The setup works well for normal use and the fuel economy is fantastic. It gets on a plane easily and tops out in the mid-30 mph range. Unless you're carrying very heavy loads and/or doing a lot of skiing, wake boarding, etc, the 60hp should work just fine.
My neighbor's 1983 Montauk has a 1999 Yamaha 90-hp 2-stroke and it has lots of reserve power. More then most people need. Lots of throttle response though!
- Chris
jimh posted 04-28-2010 09:10 PM ET (US)
A motor of model year 1985 was probably rated for horsepower at the propeller shaft. I make this inference because the specification for power output at the propeller shaft, ICOMIA 28-83, was adopted in 1983, as far as I know.
http://continuouswave.com/whaler/reference/ICOMIA28-83.html
Tohsgib posted 04-29-2010 11:25 AM ET (US)
Jim the 1985 OMC 3cyls were still powerhead rated. They did not convert until the last minute..1986.
Mobjack posted 04-29-2010 11:51 AM ET (US)
JIMH thanks for the info, i have not read it yet but it might well be correct. From everyone I had talked to about it over the years I understood the rating transition to take place sometime in the late eighties.
Oh well, given the business climate right now I don't know when I will get another shot at a something I can afford that I can also put some trust in. All I know is I have an 18 month old daughter who needs to learn to drive a whaler, and I don't care how fast it goes. The PIREPS I have received here are enough to give me the confidence that at the very least the boat should perform ok. Maybe not as fast as I would like, but ok. All things considered that is all I can ask for right now. It beats having a whaler sitting in the yard that isn't good for anything but a flower planter.

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Author	Topic: Montauk with 60-HP
Mobjack	posted 04-28-2010 02:43 PM ET (US) Have been looking at different re-power solutions for my MONTAUK for a good long while now. The used outboard market in my area has two products to offer: $500 garbage motors that are one over-rev away from the grave, and one or two year old leftovers that are basically full price. I have a friend who is getting ready to replace his Yamaha 60-HP two-cycle 90 two-cycle. I am seriously considering buying this engine for my MONTAUK. A year ago I would have said that [60-HP] was too small, but now I am desperate for a boat that works. My previous outboard was a 1985 Johnson 75. It is my perception that the horsepower of this motor was rated at the powerhead. The new yamaha is a 2000 or 2001 model, and I believe its horsepower was rated at the propeller. Based on what I have been told by a couple of mechanics, these two motors should produce similar actual horsepower. Is this accurate? If so, what else could I do with this motor to [increase] its performance? Top speed is not really important for my use, but getting up on the step with a load is important. What say you, experts?
2manyboats	posted 04-28-2010 04:18 PM ET (US) I have a 60 E-TEC on my Montauk. It replaced an older 70 Evinrude. I lost about 2- to 3-MPH top speed and I went through several propellers until I got one I liked. With five adults on board it is a little slow to plane so I just use my trim a little more. A 60-HP is fine for what we use the boat for. We are in the next-to-highest mounting hole.
contender	posted 04-28-2010 05:44 PM ET (US) You have to ask yourself a couple of questions, A deal is not a deal if everytime you get in the boat you question yourself...Why is you friend selling the 60? sounds like it was to small for his use. Do not let it happen to you. If you plan on pushing a load I would look for a larger engine. I feel that the 60 is the smallest engine that should be on a 16 whaler... To each his own, good luck
Mobjack	posted 04-28-2010 07:15 PM ET (US) [The friend feels as if the 60-HP is not enough] power. He has had [the 60-HP motor] on a 21 or 23 (can't remember which) Jones Brothers Bateau that he uses for duck hunting. I also tend to agree that I would never go any smaller than that. Up until now I don't think I would ever have considered going this small. But when you think about the horsepower, and put [horsepower] in the perspective of it being roughly equivalent in output (and lighter than) my old motor, it certainly makes me think about [deleted figure of speech involving violence which is used to mean "make a decision"].
weekendwarrior	posted 04-28-2010 07:53 PM ET (US) If this helps, I have a 50 Honda on my 17' and it's fine if you're not in a hurry, will even pull a wakeboarder with 4 or 5 adults in the boat, but it isn't a rocket with that much load. With 7 people I get mid 20's top speed (25-ish mph), cruise probably 20-ish. With only a few people top speed is just over 30mph, cruise 25-ish. I expect you would see a tad more than this with 60HP. It planes out just fine with a full boat in smooth water, would probably have trouble in rough seas with a full load, but is plenty of power for a light load in rough water. Me (160#), my brother (200#), a 30gal livewell and extra battery have no trouble at all fishing in the ocean on bumpy days, can't even open it up due to the rough water.
95Outrage17	posted 04-28-2010 08:32 PM ET (US) Our sailing club's 1987 Montauk has a 2007 Yamaha F60 (4-stroke) on it. The setup works well for normal use and the fuel economy is fantastic. It gets on a plane easily and tops out in the mid-30 mph range. Unless you're carrying very heavy loads and/or doing a lot of skiing, wake boarding, etc, the 60hp should work just fine. My neighbor's 1983 Montauk has a 1999 Yamaha 90-hp 2-stroke and it has lots of reserve power. More then most people need. Lots of throttle response though! - Chris
jimh	posted 04-28-2010 09:10 PM ET (US) A motor of model year 1985 was probably rated for horsepower at the propeller shaft. I make this inference because the specification for power output at the propeller shaft, ICOMIA 28-83, was adopted in 1983, as far as I know. http://continuouswave.com/whaler/reference/ICOMIA28-83.html
Tohsgib	posted 04-29-2010 11:25 AM ET (US) Jim the 1985 OMC 3cyls were still powerhead rated. They did not convert until the last minute..1986.
Mobjack	posted 04-29-2010 11:51 AM ET (US) JIMH thanks for the info, i have not read it yet but it might well be correct. From everyone I had talked to about it over the years I understood the rating transition to take place sometime in the late eighties. Oh well, given the business climate right now I don't know when I will get another shot at a something I can afford that I can also put some trust in. All I know is I have an 18 month old daughter who needs to learn to drive a whaler, and I don't care how fast it goes. The PIREPS I have received here are enough to give me the confidence that at the very least the boat should perform ok. Maybe not as fast as I would like, but ok. All things considered that is all I can ask for right now. It beats having a whaler sitting in the yard that isn't good for anything but a flower planter.