new 25 hp 4-stroke EFI recall

just_crsn

Seaman Apprentice
Joined
Feb 29, 2008
Messages
49
Re: new 25 hp 4-stroke EFI recall

Thanks for the info Guru, I will check on those head bolts to make sure they are tight. This is what I think could be the drain plug.....but you either need to find a tool to fit or they never put a plug in that I cant recognize. What do you think??
mercpics001.jpg
 

BF

Lieutenant
Joined
Apr 8, 2003
Messages
1,489
Re: new 25 hp 4-stroke EFI recall

Hi again,

Just... DO NOT TIGHTEN THE HEAD BOLTS!! It's important that those are torqued to spec, or the head could warp. This "recall" thingy is for the motor mounts, not the head bolts.... just... send me a PM with your email address, and I'll email you a copy of it... Merc Canada's phone number is on the letterhead.

Thanks for the info in your prop... I makes me think that I might be under propped with an 11" on there. If that turns out to be the case, I'll get another and keep the 11 for a spare, or for when I've got a big load. I'd still like to put a tach in to see for sure.
 

TOHATSU GURU

Admiral
Joined
Jul 22, 2004
Messages
6,164
Re: new 25 hp 4-stroke EFI recall

The drain bolt is down lower than the image. It's right next to the lower motor mount cover.
 

BF

Lieutenant
Joined
Apr 8, 2003
Messages
1,489
Re: new 25 hp 4-stroke EFI recall

Hey just...check your mail. I looked at the side of mine, and think this is the oil drain. Like TG said, it's just below what you posted in you last pict. Mind you, I haven't checked if that is what it is, but I'm pretty sure. It's just below the plastic shroud that you took off.

Here's a pict of what I'm taking about. Too busy to do anything on the boat today (hockey windups)... will probably roll it out to work at it tomorrow evening.
 

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Jigmaster

Cadet
Joined
May 6, 2008
Messages
8
Re: new 25 hp 4-stroke EFI recall

Just Bought same Motor For my Jon 1680 im having Tiller shifting Problems not sure if any one else is? It seems to go from Forward to reverse with not much Neutral. when its in Neutral makes a humming noise as if half way in either gear. Other than that its great. I may change the Prop though it came with a 9.5 pitch so its got alot of low end gear. i ifigured the Boat engine two people and gear should be around 1500 lbs. Also may have to look into a Portable Tach. They said there is an over rev limitter. The other side is you dont want to over load the engine w- too much pitch. Any thoughts......

Apparently there is a recal~ if you look at the front of the motor there should be a white dot if it has allready been done if this helps (motor Mount bolts)
 

BF

Lieutenant
Joined
Apr 8, 2003
Messages
1,489
Re: new 25 hp 4-stroke EFI recall

thanks... will look for a white dot on mine... The recall letter had my serial number on it, so I'd guess it hasn't been done yet.

I have an 11" pitch on mine... it was the highest the place I bought it from had on hand, but I thought it shouldn't be far off. If they had 12" I would've probably gone with that. I suspect that with 9.5", you might be underpropped if your rig is light. Just_crsn is running a 12.5" on his jon, but it didn't sound like he had ever put a tach on it.

I still haven't had mine out, but have had it running for a few minutes in a can. Seemed smooth enough. I don't know about how the shifting is on mine (yet). If you think it's partially in gear when it's in N, I'd definately take that in and have it checked. You could be hurting the clutch dog in the lower unit. You paid for that warranty, might as well use it!!

good luck
 
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Jigmaster

Cadet
Joined
May 6, 2008
Messages
8
Re: new 25 hp 4-stroke EFI recall

thanks... will look for a white dot on mine... The recall letter had my serial number on it, so I'd guess it hasn't been done yet.

I have an 11" pitch on mine... it was the highest the place I bought it from had on hand, but I thought it shouldn't be far off. If they had 12" I would've probably gone with that. I suspect that with 9.5", you might be underpropped if your rig is light. Just_crsn is running a 12.5" on his jon, but it didn't sound like he had ever put a tach on it.

I still haven't had mine out, but have had it running for a few minutes in a can. Seemed smooth enough. I don't know about how the shifting is on mine (yet). If you think it's partially in gear when it's in N, I'd definately take that in and have it checked. You could be hurting the clutch dog in the lower unit. You paid for that warranty, might as well use it!!

good luck


Yes it has alot of low end Gear with the 9.5 Pitch pushing around 18-20 knots i just bought the Black Max 11 pitch so maybe i can get 20-25 the Boat is pretty wide very Wide actually it is welded and over 72 in wide at the top of gunnel considered a super Jon it had a 40 on it when i bought it. i figure the Boat has to weigh 500-600 lbs. motor 186 me at 265 fishing buddy gear cooler ice, and Gas at another 350. I figured 1,400 lbs, give or Take an 11 pitch should be the middle of the Road.

Are you using Star-tron addative or do you not have Alchohal/ Ethanol in your area?
 

Jigmaster

Cadet
Joined
May 6, 2008
Messages
8
Re: new 25 hp 4-stroke EFI recall

I checked w bass pro the 16 jon is rated for the 9.5 pitch according to them i bought the 11p and will see hoe it does they did caution about over proping
and putting too much load on the engine. I will put it on and see the Difference.

Ideally a portable Tach would be the right way to do it.
 

BF

Lieutenant
Joined
Apr 8, 2003
Messages
1,489
Re: new 25 hp 4-stroke EFI recall

just an update...

I got my 25 out a few times... now I have ~3 hours or run time on it. I'm pretty sure that I'm not underpropped with the 11" on it. I don't have a portable tach, but I think I made a good guess on pitch. With a medium load in the boat, (2 adults, a couple small kids and light gear) it'll hit 28 mph (wheel speedo) and sounds good at WOT.... with 2 adults, and light gear, it'll see 30 mph... and with me alone, basically with an empty boat it'll hit just over 33 mph, and although the motor's spinnin' up, it does not hit the rev limiter.

Performance-wise, it seems to be about what I should be getting out this rig.

Now my review of my motor....

It starts easy, and is quiet but definitely not silent at idle. Maybe I was hoping for too much, but I would've liked it to be quieter. The difference in loudness is most impressive at mid throttle settings (slow cruise)... you can still converse with passengers without having to shout.

I don't like the twist grip gear shift that's part of the tiller. It's not very smooth, and takes more than a firm twist to shift gears. Sometimes it feels like you've got to force it and it just doesn't feel good.

Maybe it has something to do with still being in the break-in period... or that the spring water here is very cold... but the idle seems a bit high, and also tends to surge whenever you shift into gear. Maybe that's just the way it is.... it's like the CPU or whatever it has, senses a rpm drop when you shift into gear, and quickly gives a bit of throttle boost to compensate. After a couple seconds the rpm's drop back down. But this, coupled with the clunky shifter, means that rapid changes from fwd to rev (e.g. when docking) are not smooth, partly because the idle is up a bit (on it's own). It's bad enough that I don't know if wifey will be comfortable docking it. My friend almost smacked the dock when I let him drive it, because of the difficulty in getting it out of gear, and then quickly into R for braking.

Lastly, I really don't like the manual tilt operation. It locks to the trim bar when in Neutral or Reverse. It unlocks when the motor is in Forward. This means that you have to be in forward to either switch to the 'shallow water' setting, or to tilt the motor up all the way. I find this to be a PITA! When coming into shore with the potential for rocks, you either have to shut the motor down (in fwd) and put it shallow water mode and restart, or you have to fight the motor up at idle (in fwd) to get to the shallow water drive position. If you chose the 2nd option, you have to tilt not only the weight of the motor, but also against the force of the motor is pushing against the transom. Now that I have this motor, I remember having a 9.9 merc in the 80's and that had a similar setup. I thought it was stupid then too. Older OMC's are much better designed tilt-wise. Just a lock and unlock position, nothing coupled to the shifter. Can be pulled up to shallow drive position with engine running in neutral.

I would like to be able to modify mine so that it operates the same way as the OMC's, but I'm not sure if it's feasible. I may end up removing/disabling the lock mechanism altogether. (?) I'd just have to be careful not to reverse so much as to lift it. The motor is heavy enough that I don't think there is any chance that rope starting it in neutral will tilt the motor up, so I don't know why the thing is designed to lock in neutral in the first place.

Perhaps this coupling of the tilt lock to the shifter is why the shifter feels so cruddy??? Too many parts connected to the twist grip.... (?) Hmmmm...

Anyway, that's the review so far.... not overly glowing, but the motor seems to run great, other than the business of the hovering idle. As I said, performance seems good, and fuel economy seems great (so far) compared to a 2 stroke 25 hp.

By the way, yes 10% ethanol is common around here..... premium is still straight gas. Although the manual says the motor will tolerate 10%, it'll get straight gas unless I'm stuck with ethanol somewhere.

Oh, and I still haven't done anything about the recall.

that's my $.02
 

okgc

Recruit
Joined
Jun 1, 2008
Messages
1
Re: new 25 hp 4-stroke EFI recall

Thanks for the recall info as we received one of the recall letters also. We have one of the these 25hp EFI motors that is a Big Foot version on our Tracker pontoon boat. Really didnt want to trailer the rig over to our dealer which is a few miles away.

As far as the engine drain plug, I agree the owners manual could & should have a better picture or drawing.
 
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