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Author Topic:   Mercury To Replace Poor Shifting 90-HP Four-stroke
clposko posted 03-11-2006 11:22 PM ET (US)   Profile for clposko   Send Email to clposko  
Three years ago I purchased a new 170 MONTAUK with a Mercury 90-HP four-stroke outboard. I love the boat. My next boat will be a Boston Whaler. However, there has been a problem with the motor's gear shift from the first day. It is hard to get into reverse, hard to go from reverse to neutral, skips neutral and goes into forward, etc. I had several other Boston Whaler owners operate the boat, and all noticed the problem.

The dealer has been aware of the problem and has made several attempts to fix it. Last fall [the dealer/Mercury?] revealed that there has been a problem with a few boats. This winter the dealer had two gear shifts built to bluepint specs as replacements to fix the problem. I called the dealer on March 10, 2006, and I was told that [the dealer/Mercury?] did not fix the problem and that my boat and two others would be replaced with new designed Mercury engines. This is to happen sometime in April 2006.

This is my first boat. I bought it for its reputation. My wife and kids have not been able to operate the boat because its to dangerous when docking, sking, tubing, etc. I have nothing in writing that the the boat is getting fixed or when it will be ready. I purchased the boat at Chesapeake Whaler Towne in Annapolis, Maryland. I can't say enough about how much they have helped and kept me informed. I know they are doing everything they can, but I am sure they are getting their orders from Mercury, Boston Whaler, or Brunswick.

Have others experienced this problem? Have you any suggestions for me? Thanks, Chris Posko

fishin8tor posted 03-12-2006 12:29 AM ET (US)     Profile for fishin8tor  Send Email to fishin8tor     
I have had my Montauk 170 with a 90-HP four-stroke for six months. The problem I first noticed was the lack of a detent in the throttle. It made it hard to manuever near the dock. A friend has the same boat and he said it gets better and you will get used to it. Well, he's sort of right. It got a little better, but I am still not used to it. Hope this helps.
jimh posted 03-12-2006 09:17 AM ET (US)     Profile for jimh  Send Email to jimh     
Here is my interpretation of your situation:

You purchased a defective Mercury outboard. You are being offered the remedy of receiving a new outboard to replace the defective one. The replacement motor will be a newer design, a newer model, and a newer model year.

I would accept this remedy, if it solves the original problem, the poor shifting.

Re the new motor: if the new motor is one of the new "baby Verado" power head motors, there has been some speculation that the gear case on that motor will be the same as the one on the motor you currently have. That is not to say it won't solve the problem.

I have no idea how prevalent this problem with shifting on the Mercury 90-HP four-stroke is in the field, however, it has been mentioned before by other owners.

kamie posted 03-12-2006 12:12 PM ET (US)     Profile for kamie  Send Email to kamie     
Not sure what you mean 'by orders', have they not tried to fix the issue? Obviously from the dealer/manufacture perspective they want to repair rather than replace with a new motor so I am certin they have gone thru the normal list of repair options. Since they have not been able to fix it, they are replacing the motor. Do they work with Mercury on these issues, of course they do. I would insist on a sea trial of the new motor so you can test that it works correctly.
Marsh posted 03-12-2006 07:52 PM ET (US)     Profile for Marsh  Send Email to Marsh     
For what it's worth, when cold, my 2005 Merc 115 hp 4s is VERY hard to shift from forward, into neutral, into reverse. I have to exert significant force on the shifter handle to get it to shift. So much so that it often skips right past the detent, and into the reverse gear.

But this ONLY happens when the motor is cold, after first starting up. After a short warm up, it shifts as smooth as can be. But let me tell ya: that first shift or two after backing off the trailer is very, very tricky. I have found that the most prudent thing to do after backing off my trailer, is to continue backing for 30-45 seconds. No problem as long as the launch area is clear. But in heavy traffic, it gets VERY interesting when one cannot reliably shift into neutral.

I have not consulted with my dealer; perhaps I should, in light of your woes, cplosko.

Marsh

jimh posted 03-13-2006 09:30 AM ET (US)     Profile for jimh  Send Email to jimh     
Perhaps other 90-HP Mercury four-stroke owners can comment on their shifting performance.
Marlin posted 03-13-2006 10:02 AM ET (US)     Profile for Marlin  Send Email to Marlin     
I have a 2003 Mercury 115 4-stroke. My understanding is that the gearcase is the same as the 90 4-stroke, so hopefully these comments will be relevant.

The biggest difference I found on this engine (with respect to shifting) compared to all other outboards I have used is that there is no detent on the shifter. The shifter freely moves between forward, neutral, and reverse with no latch, button, or other locking device. I don't know whether this has become the "commonly accepted" method of late, but I find it to be a poor design for the following reasons:

1) When attempting to shift into neutral, it is very easy to pass right by and engage the opposite gear. I did this quite often during my first season, often at the most awkward moments, but now that I've developed a feel for the shifter, it happens infrequently. My guest skippers have this problem all the time.

2) It is easy to partially engage the gears. I have read the various accounts of "whining" and "grinding" in neutral with these engines, and I sometimes experience the same thing. I have always been able to eliminate it by twiddling with the neutral position on the shift lever, or by engaging forward and then returning to neutral. This is not simply a matter of adjusting the cable(s), since there is no positively defined neutral position on the shifter.

3) On two occasions, the engine has spontaneously shifted from neutral into reverse. This happened once while I was standing at the console, and I wondered whether I had accidently bumped the lever. The second time, however, the boat was alongside the dock and I was standing in the stern handling a line. The moral of that story is do not have swimmers at the stern with the engine running.

With respect to operating when cold, the engine does seem bit more sluggish to shift when cold. I have operated this engine at air temperatures as low as 24 deg. F in brackish water at 30 deg. F without significant problems. This was using standard OEM gearcase lube and 5W-30 synthetic crankcase oil; the oil pressure buzzer sounds for a few seconds until the pressure comes up.

Bulldog posted 03-13-2006 10:33 AM ET (US)     Profile for Bulldog  Send Email to Bulldog     
Marlin, that doesn't sound right, had your dealer looked into the no detent issue? I would check with Mercury if that is proper operation, sounds like an accident waiting to happen......Jack
FISHNFF posted 03-13-2006 06:11 PM ET (US)     Profile for FISHNFF  Send Email to FISHNFF     
Inside the shifter, there is a ball, which rides along a track. There is a tension adjustment for track.
There is a detent in the track where the ball would stop.
I lube mine annually. It seems that yours may just be out of adjustment.
My shifter (Merc 90 4 stroke 2000) has the chrome arm. Older style.

FISHNFF

My lower unit has the 2.07 gears. The newer ones have the 2.33, which were the same as the 2 stroke 75/90.
IMHO the 2.33 is better than the 2.07.

hhagan posted 03-13-2006 09:05 PM ET (US)     Profile for hhagan  Send Email to hhagan     
I have a 2004 115 4 stroke with console shifter. Same problem with tricky shifting. You have to be very careful especially when docking the boat. I have spoken to mercury and the dealer about this. There is no adjustable detent on this shifter. The best way to handle it is to make sure the shifter cables are precisely adjusted so the central/neutral position on the shifter/throttle corresponds to the engine's neutral. You do get used to it but I think it is a poor design and inherently dangerous, as a told Mercury Marine. NEVER HAVE ENGINE RUNNING WHEN SKIERS OR SWIMMERS BOARDING THE BOAT! As usual however, little help or response from Mercury.
Marsh posted 03-13-2006 09:22 PM ET (US)     Profile for Marsh  Send Email to Marsh     
Messrs. Hagan and Marlin:
I agree...a VERY poor design. The lack of a detent would imply that the engine was designed and produced by those who have never had the opportunity to operate a motor vessel of any size. Makes one wonder what other design flaws reside deep inside the Mercury engine, completely hidden from the consumer.


Marsh

Marlin posted 03-13-2006 10:50 PM ET (US)     Profile for Marlin  Send Email to Marlin     
In all fairness, let's discriminate between components. The real problem here, from my perspective anyway, is the shifter lever. The shifter simply lacks the button, usually on the underside of the tip of the lever, that unlatches the neutral lock and allows the engine to be put into gear. The engine does exactly what the shift cable tells it to, and it does it (in my case anyway) without any problem. Well, okay, it's a bit more of a thunk than I'd like, but nothing serious.

In all other respects, I've had about 250 hours of smooth, quiet, efficient, flawless performance from the 115 4-stroke.

-Bob

pmerrill posted 03-13-2006 11:27 PM ET (US)     Profile for pmerrill  Send Email to pmerrill     
re Merury 4 stroke not shifting. I have the same problem. Expect to get it fixed the same way. Good summary. It is very much in Whaler and mercury's interest to fix it and having acknowledged problem see no reason why they are not acting in good faith.
elaelap posted 03-14-2006 12:27 AM ET (US)     Profile for elaelap  Send Email to elaelap     
Those who haven't yet done so might want to check out tigercub's parallel thread--"Mercury 115-HP Four-stroke: Grinding Noise--running right now over in the Performance forum.

Tony

kamie posted 03-14-2006 01:26 AM ET (US)     Profile for kamie  Send Email to kamie     
I have a simular problem to what Marlin described with my new 2005 Merc controls. By the end of the summer I was better at it, but I am sure it will take some getting used too on the first couple of outings.

It does beat never being able to turn the engine off or having to start it with a pair of pliers.

mikeyairtime posted 03-14-2006 09:24 AM ET (US)     Profile for mikeyairtime    
I figured it out pretty quick but my wife still struggles with it. I'm tall and by pulling up and back it seems to find neutral more redily than if I pull straight back. Still not very trick but I've come to terms with it.
montaukman posted 03-14-2006 12:03 PM ET (US)     Profile for montaukman  Send Email to montaukman     
Hi.

My 2005 170 has the hard to perceive nuetral and I too have over shot nuetral to find myself in reverse a few times.

I was under the impression that this was a "quirk" and that even if the cables are adjusted correctly, it will still be present.

Additionally, I was told to shift quickly and decisively into reverse and forward to avoide the "grinding". I still get the big "think" from the heavy prop.

I have gotten better at shifting but it is still annoying and my buddy, who had a piece of junk trihull, always ribs me about the money I spent on a whaler and the lousy shifting capabilities of this setup. His trihull shifted effortlessly.

Oh well.

All the best,

Alan

whalerdude posted 03-14-2006 01:03 PM ET (US)     Profile for whalerdude  Send Email to whalerdude     
My 2006 EFI 90 on my montauk has the 'vague' shifter detent too. I felt like a real loser in front of my family the first few times that I brought the boat into the dock!

I'm doing better after 2 months of practice.

The shifter was a big reason that I was reluctant to switch over from Yamaha to Merc. I loved the shifting on my last 3 Yamaha powered Whalers. Big difference there.

I'm hoping to get used to the vague shifter as I put some major hours on my boat this season.

bobeson posted 03-14-2006 01:32 PM ET (US)     Profile for bobeson  Send Email to bobeson     

My 2003 Merc 90hp four-stroke has clunky shifting, with some small amount of gear grinding during shifting, but as long as I shift quickly and decisively it seems to perform adequately. I'm not pleased with it, but I can live with it. I guess I'm fortunate not to have a much worse situation based on what I'm hearing in this thread. I've heard many other owners complain about poor shifting before, but I didn't realize that it got as bad as what is described here.

My second child was born last week, and now it has been almost 6 months since I've used my boat. I'm not even going to try to start it without pulling my carbs off for another rebuild to clean out all the gunk first. It looks like I don't need to worry about getting it ready for the salmon season though - we might not get to fish for salmon this year at all in california. Now that my wife is not pregnant we can go diving again at least.

richvi posted 03-15-2006 11:43 PM ET (US)     Profile for richvi  Send Email to richvi     
I had the problem with my 2005 60-HP Mercury four-stroke outboard motor. The dealer upgraded the shifting cable and that solved it. The dealer said there are two grades of shifting cables.
jimh posted 03-16-2006 12:08 AM ET (US)     Profile for jimh  Send Email to jimh     
richvi--I was always under the impression that Boston Whaler used the PREMIUM GRADE SHIFT CABLES when they rigged their boats. I am surprised to hear that your boat was delivered with cheaper shift cables.

When the cables were upgraded, what brand and model of cables were used? What brand and model were discarded?

TightPenny posted 03-17-2006 04:13 PM ET (US)     Profile for TightPenny  Send Email to TightPenny     
Sure glad there is a Johnson on my Montauk. :)
nydealer posted 03-17-2006 08:15 PM ET (US)     Profile for nydealer  Send Email to nydealer     
We received information from Mercury about the exact make-up of the New Verado 75-90-115 4-stroke. This new engine uses the same power head as the 135-175 but without the supercharger. Everything below the power head is identical to the current 75-115. Published weight on this engine is 399lbs. This engine does not have DTS. The person we spoke to at Mercury said that during his run with this engine he had no problems shifting but it was on an aluminum boat with a side mount control which has a lock when you return to neutral. My feeling is that it is not a problem with the engine but in the controls. Jim, Mercury makes standard cables and also offers Platinum Cables. Unless it has changed recently, Legend models are shipped with the standard cables.
jimh posted 03-17-2006 11:22 PM ET (US)     Profile for jimh  Send Email to jimh     
nydealer--Thanks very much for the information on the shift and throttle cables. I don't think the premium cables are outrageously priced, and an owner-upgrade to them might be a good idea for people who are not happy with the way their current engine rigging is shifting. On my older boat, the original rigging was done with cables that seem a bit short, making for some tight bends. I will look into replacing the cables with new ones that are a foot or two longer, and probably look at an upgrade, too.

Thanks also for the information on the weight of the new four-stroke motors. I do not believe it has been mentioned before. At 399-lbs that is not too heavy for a 115-HP motor.

PMUCCIOLO posted 03-18-2006 01:04 AM ET (US)     Profile for PMUCCIOLO    
...but it is too heavy for a 75HP or 90HP motor.
dirk posted 03-18-2006 02:48 AM ET (US)     Profile for dirk    
I live in Belgium.I had a Jumbo 475 with Johnson 2-stroke for more than 10 years. I never had problems shifting and docking.
As I do a lot of fishing and I like the BW Montauk very much for that purpose,last year I bought a BW Montauk with Mercury 90hp 4-stroke. I had to do so as boat and motor came together.
It became and still is a real nightmare ! The boat is very good but the motor's shifting is a real disaster (see my other postings).
On my first trip out I almost had an accident when docking.
All what's is described before about the shifting of the Mercury 90hp 4-stroke is, sadly enough, true. Especially the fact that the neutral is very, very difficult to find : so you get in reverse when you think you are in neutral, etc. This is really a safety issue !!!
My dealer ignored my problems, so I had no longer any confidence in this dealer.
For this moment another dealer is trying to solve the problem. I don't know what the result will be, but I hope for the best.
I regret the fact that Mercury pays not enough attention to this problem.
Needless to sa


dirk posted 03-18-2006 02:51 AM ET (US)     Profile for dirk    
Needless to say I am very disappointed in Mercury.
Is there no possibility for a combined action from all the owners who experience the same problems ?
nydealer posted 03-18-2006 09:13 AM ET (US)     Profile for nydealer  Send Email to nydealer     
I was quite concerned when I heard about Mercury using the 135-HP (and higher) power head on the new [FourStroke] 75 to 115-HP. I figured it would tip the scales at 450-lbs. With using the same components, it only adds 13 Lbs. The current 75-HP four-stroke is 386-bls. I don't think that [the added 13-pounds of the new FourStroke 75] will be a big difference.

All previous Mercury console controls have the same design. They allow you to shift into and out of gear without a shift lock. The previous controls were great and would shift with no problems. This new style control came out about the time of the 75-115 Merc engines. I wonder if there is a problem with the engine and that is why the controls had to be loosened up? Could be the lesser of two evils. I will look into possibly getting the older control and see if it would work with this engine. If it is still available, it might be a possible option.

The Judge posted 03-18-2006 10:46 AM ET (US)     Profile for The Judge  Send Email to The Judge     
Guys...not trying to be a smarty but why not buy a new shifter? I would go with a nice Morse control. A Yamaha will interchange as well. If boat had no shift detent, I would replace the controls and tell the dealer to go [do something else].
AllanR posted 03-18-2006 11:01 AM ET (US)     Profile for AllanR  Send Email to AllanR     
Seems to me Mercury ought to take this issue very seriously. It is not just a convenience or noise issue, it is a serious safety issue. Someone is going to get hurt, if they haven't been already. When an owner has to be extremely careful of how they operate a boat because of a defect with a primary engine control, that is not good.Those engine controls absolutely should have a detent stop that prevents the engine from going into an unwanted gear. And no one should have to purchase "platinum" cables to help fix it. It should work properly from the dealer. It doesn't say much about their design or prerelease testing process. It also illustrates the inherent problem of forcing people to take an engine brand that some really don't want.

This will cause some people not to want to purchase Boston Whalers.

This blog is a real public service when it enlightens people about info like this. You can bet the manufacturer reads it, and maybe they will take appropriate action.

This reminds me of a time once when I had a Toyota Supra that I purchased in 1987, new. Within the first 1,000 miles it developed a problem in the steering which would hang up in a turn in certain situations. It was very dangerous. Only after several visits to the dealer did they fix it, but they did. However, it shows that even a highly respected brand can have these problems. But they need to act on them in a timely fashion when there is a risk of injury, as here.

jimh posted 03-18-2006 11:10 AM ET (US)     Profile for jimh  Send Email to jimh     
From my observation, we have had four sources proposed as the root of the problem with the difficult shifting of the 90-HP Mercury four-stroke motor:

--The motor itself. This is the conclusion from the originator of this discussion and apparently coincides with the dealer and manufacturer's assessment. To cure the problem they are replacing his motor. This is the most expensive remedy.

--The shift cables. Several suggest the problem can be remedied by replacing the shift cables with ones having better performance. This is an inexpensive remedy.

--The throttle and shift controls. The controls and their lack of a built-in mechanical detent to assist in locating the neutral shift position are cited as the source of the problem. This remedy is more expensive than new cables, but much cheaper than a new engine.

--The adjustment of the linkage. Improper adjustment of the shift linkage has also been cited as the source of this problem. This is least expensive remedy.

The problem with poor shifting on the Mercury 90-HP four-stroke motor is apparently somewhat widespread. Can we please have some evidence about the real source of this problem? Which one of the four explanations is correct?

ADKWhaler posted 03-18-2006 01:34 PM ET (US)     Profile for ADKWhaler  Send Email to ADKWhaler     
This issue has come up before on the forum. I have a 75 HP Mercury 4 stroke on my 2000 Montauk. I received a recall notice on the engine, for problems with the Shift-Link Assembly. I had the recall work done-- about a year later, still had rough shifting, and then lost neutral, all together. Had the shift link assembly replaced-- running fine ever since.
clposko posted 03-18-2006 09:27 PM ET (US)     Profile for clposko  Send Email to clposko     
Thanks for your response and all your info. I'm glad to hear I'm not alone. I told my dealer to read your comments and see if he can give all of us a reason why this is happening and why it can't be fixed with-out replacing the engine. Next week I'll find out what engine they will replace it with and pass it on.
erik selis posted 03-20-2006 04:20 AM ET (US)     Profile for erik selis  Send Email to erik selis     
Anyone know for sure if the binnacle controls are the same for a Mercury 90-hp 2-stroke and the 90-hp 4-stroke? IMO they both are the same but I'm not quite sure.
I have the 2-stroke engine on my 170 Montauk and I don't have the problems that many others have reported here so I'm also not sure if changing the controls would solve the problem with the 4-stroke version. I feel a clearly defined neutral position with my set-up and can easily shift from neutral to forward or reverse making docking a piece of cake (if there's not too much wind that is).

Erik


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