HOC member login

Message Board

Message board > Engines > What HP needed to get a Navigator planning?

Message 29 of 29
Posted by member Tom Storey on Thursday 22 July 2021

Thanks Simon,

so by that logic more 4-stroke horsepower is not the answer, given that it would probably come with a ~20kg weight penalty? The question is though, can I reasonably expect it to work at all with the 60hp 4-stroke (helmsman's competence notwithstanding..)?

Tom

Add your comment

Message 28 of 29
Posted by member Simon Papendick on Thursday 22 July 2021

Hi Tom and the other people
on this thread
The main problem with the reason that the boats not getting on the plane. is that if the forward ballast is not put in the bow of the cabin under the forward berth. I have put ballast in the bow , about 75 kgs of metal bead shot. This keep the bow from going up in the air as you put the power on the outboard and gives the boat a chance to get over the bow wave and on to the plane. you also have to trim the outboard while getting the boat on the plane. Trim tabs also help. The other problem is that the modern 4 stoke outboard are a get deal heavier than the 2 stoke outboard these boats were designed to have on the transom. So with the added weight it is going to be a major problem getting any of the smaller Hardy boats on the plane,

Kind Regards

Simon Papendick
Former Hardy Marine Employee 1983 to 1990
and Professorial Skipper for over 40 years

Add your comment | ^Top

Message 27 of 29
Posted by member Tom Storey on Thursday 22 July 2021

Hi,

Hopefully this is closely enough related that you might be able to help me out too.

I recently took on a Seawings 194 from my father-in-law, who hasn't used it much in years. It's in good condition and has a low-hours Mariner 60EFI 4-stroke that I can only get to rev up to 4200rpm and won't get the boat on the plane. The engine has just been serviced and declared in good condition.

My issue is that the motor is a 18.3:1 version (NOT Command Thrust) and is already running a 10-7/8x11 propeller, so I don't think there's very much further I can go with pitch reduction.

Has anyone else had a similar experience or a reasonable idea of what's going on that will give me a route to getting more out of the boat?

Thanks very much in advance..

Tom

Add your comment | ^Top

Message 26 of 29
Posted by member Julian on Monday 19 December 2011

We have a Mariner 50 hp 4-stroke bigfoot on the Navigator and it planes fine with 2-3 up as well as carrying an amount of fishing gear and an auxillary mounted on the transom. Max speed is about 18-19 knots when the sea is calm, 14-15 when the sea has a few rollers and troughs.

Add your comment | ^Top

Message 25 of 29
Posted by member Dee on Wednesday 23 November 2011

Lectro Tabs sold by A.S.A.P supplies in Beccles, Norfolk are the ones to go for. I can't talk about the Navigator but have fitted them to the Family Pilot 20 and they have made a big difference. When thinking about weight distribution, consider spreading weight over then entire length of the boat instead of concentrating everything in the cockpit which only takes up about one third of the rear of the boat.

Add your comment | ^Top

Message 24 of 29
Posted by member Damien on Wednesday 23 November 2011

I got mine on eBay smart tabs €160 bargin easy fit best ting I ever done u won't be sorry ,

Add your comment | ^Top

Message 23 of 29
Posted by member Keith Musk on Monday 21 November 2011

Hi Guys All this talk about trim tabs what are best to buy. Cheers Keith.

Add your comment | ^Top

Message 22 of 29
Posted by member Damien on Tuesday 15 November 2011

Hi I store my back engine at the bow and with the trim tabs I get the 23 knots I wonder what will the fuel be like at that speed ? I have a test run soon to new Ross

Add your comment | ^Top

Message 21 of 29
Posted by member Damirn on Monday 14 November 2011

I have a mariner 01 60 hp. 2 stroke Manx speed 23 knoths trim tabs are great plain with in seconds play with the trim and tilt more knoths

Add your comment | ^Top

Message 20 of 29
Posted by member Alan Canavan on Tuesday 8 November 2011

When I took my Navigator for a test run prior to buying I could only get 11knts from a 40HP Suzuki outboard. It was not trimmed properly, I moved the engine away from the transom to straight down and went up on the plain doing 22knts. When I bought my navigator they had a bag of gravel for ballast,in the bows. I moved my two batteries to the bows instead, fitted a Yamaha 60HP two stroke and achieved 26knts on the plain with four adults and two children. All you need is weight up front and your engine trimmed properly. You will not go on the plain if all your weight is in the cockpit. I now have a 60 Yamaha four stroke (wonderful fuel savings) and trim to 3 bars showing, go on the plain at 4,000 rev's throttle back to about 3,700 revs. I can still plain with fairly heavy loads as I carry supplies from time to time.

Add your comment | ^Top

Message 19 of 29
Posted by member Howard on Monday 7 November 2011

I changed my Johnson 60hp 4 stroke last year for a new Evinrude 60hp direct injection 2 stroke. It is much lighter so that getting in the plane is very comfortable. My boat is a Seawings 194 & easily cruises at 16-18knt with comfortable 20-22knt at 5,200 revs.

Add your comment | ^Top

Message 18 of 29
Posted by member Simon Kidd on Monday 31 October 2011

Trim Tabs on Navigators rock! What speeds are you getting with the 2-stroke 60, and also what engine is it? Is it a moden Injected 2-stroke or a good old carb type? It's always great to know how the different rigs perfom. Cheers, Simon. HOC Tech.

Add your comment | ^Top

Message 17 of 29
Posted by member Damien on Sunday 2 October 2011

Got rid of the 60 Hp 4 stroke to heavy got a 60 Hp 2 stroke much Simon trim tabs best thing I ever bought

Add your comment | ^Top

Message 16 of 29
Posted by member Simon Kidd on Tuesday 20 September 2011

Damian, How did the test run go? I have trim tabs on my navigator - makes a huge difference. Simon

Add your comment | ^Top

Message 15 of 29
Posted by member Damien on Monday 19 September 2011

Trim tabs are great got on the plain in seconds max 22 knoths

Add your comment | ^Top

Message 14 of 29
Posted by member Damien on Tuesday 13 September 2011

i just bought and fitted smart trim tabs my self today test run tomorrow morning and a new four blade prop hope all goes well s ireland the hook head

Add your comment | ^Top

Message 13 of 29
Posted by member Damien on Wednesday 24 August 2011

Hi I have a hardy 18 ft navigator with a mariner 60 4 stroke can't get on the plain tried 3 props different pitch 12 knoths max what else can I do

Add your comment | ^Top

Message 12 of 29
Posted by member Sean Cunniffe on Thursday 26 May 2011

My Hardy 18 has a Honda 45 4 stroke, it will get on the plane provided only two on board and does 18 knots

Add your comment | ^Top

Message 11 of 29
Posted by member Peter Stephens on Monday 28 December 2009

My hardy navigator planes great with my 60hp mercury 3 cyl,mine has power trim and tilt and this is a must,i also have fitted manual smart trim tabs which really help to keep the bow down with less wake at low speeds,many thanks.

Add your comment | ^Top

Message 10 of 29
Posted by member Peter Stephens on Monday 28 December 2009

My hardy navigator planes great with my 60hp mercury 3 cyl,mine has power trim and tilt and this is a must,i also have fitted manual smart trim tabs which really help to keep the bow down with less wake at low speeds,many thanks.

Add your comment | ^Top

Message 9 of 29
Posted by member Peter Stephens on Monday 28 December 2009

My hardy navigator planes great with my 60hp mercury 3 cyl,mine has power trim and tilt and this is a must,i also have fitted manual smart trim tabs which really help to keep the bow down with less wake at low speeds,many thanks.

Add your comment | ^Top

Message 8 of 29
Posted by member Andy Mcmullan on Friday 12 October 2007

To my knowledge no matter what size your outboard, you need to be able to achieve a wide open throttle rpm that is within the maximum range for the engine. It is also preferable to reach the engines theoretical max with your normal load as you can just throttle back from there. If you can't reach max revs then your engine is driving the wrong 'gear' for your boat. You won't reach maximum performane and you are over stressing your engine. You need to experiment with your prop size and pitch to hit the right revs. Cheers Andy

Add your comment | ^Top

Message 7 of 29
Posted by member David Jeffrey on Thursday 10 May 2007

Hi James,you need 60 HP with a prop pitch of 13 1/4x 17 or 13 1/4 x 16 1/2 . The 3 cylinder Evenrude or Johnson or Yamaha long shaft were good engines for these boats.Power trim is a must.The engine must be mounted right down on top of transom otherwise you will get cavation.GOOD LUCK

Add your comment | ^Top

Message 6 of 29
Posted by member Thomas Michling on Tuesday 10 April 2007

Hello Hardy-owners! Damned, it doesn't worked as I hoped. The 5000 rpm are reached with the new stainless-steel-prop, but without leaving my wife at home( not such a bad idea, isn't it?), theres no chance to get really on the plane. But most of the time I'm on my way at the channels of the netherlands, with a speed-limit of 12 km/h. I wish all Hardy-owners a nice season with much fun and good weather!! Greatings from germany, Thomas Michling.

Add your comment | ^Top

Message 5 of 29
Posted by member Thomas Michling on Tuesday 6 February 2007

Hello to all interested! Back again, as promised! I bought for my navigator 18 a Quicksilver Performance Plus Stainless Steel Prop with a pitch of 12 inches at the BOOT-exhibition in Duesseldorf, Germany for about 300 Euro. High quality, very heavy, excellent manufactured, absolutely to recommend!! The expert at the exhibition promised a gradient at about 30 % against the Series-prop. That confirms the experiences I made in history. I hope I'll reach 5000 rpm, this will help to increase the speed and get on the plane. As soon as possible I'll send the results of the test drive to the forum. Kind regards from Germany, Thomas Michling.

Add your comment | ^Top

Message 4 of 29
Posted by member Gege13 on Sunday 1 October 2006

Quel est le poids maximun possible d'un moteur hors bord sur un hardy 18 navigator. thank -you A french hardy

Add your comment | ^Top

Message 3 of 29
Posted by member Thomas Michling on Tuesday 19 September 2006

Hi James, I'm also an owner of a Navigator with a 45 HP HONDA ( the last one at the right side of the gallery). I have a lot of equipment on board, cooling box, cooker, heater, TV, 30 litres fresh water, 50 litres of petrol, Porta Potti, furniture and so on. This makes it impossible to get on the plane. My highest speed is about 12 knots at 4200 rpm. I'm looking for a stainless steel prop with a pitch of 11 or 12 inches for the next season. If I've checked it out next year, I'll call you back! Hope you enjoyed my cute school english :-)). Greetings Thomas.

Add your comment | ^Top

Message 2 of 29
Posted by member Andy Mcmullan on Tuesday 18 July 2006

A berth holder in my marina has a Navigator with a 45hp Honda 4-stroke. It goes very well with this engine and certainly planes with no difficulty.

Add your comment | ^Top

Message 1 of 29
Posted by member James on Tuesday 11 July 2006

Either one or two up ? Pretty lightly kitted out atm and dry. We have a Suzuki 40 on her and I am guessing at not much more but I would value your opinions please..... p.s. If anyone has such a setup what is the insurance scenario. Thanking you in advance, James

Add your comment | ^Top

You must be logged in to post to the Hardy Motor Boat Owners Club message board. Click here to login in. If you’re not yet a HOC member then why not join us today?