Merc 135 upgrade

IGIFF

Cadet
Joined
Mar 22, 2010
Messages
26
Hi all,
Can anyone please tell me what the difference is between a 1993 135 and a 150 and what I need to do to increase my 135 to 150hp.I have perused manuals and parts catalogues and see no difference.Anyone who has done this might like to share their finds.
Many thanks
:confused:
 

sschefer

Rear Admiral
Joined
Nov 13, 2008
Messages
4,530
Re: Merc 135 upgrade

Hi all,
Can anyone please tell me what the difference is between a 1993 135 and a 150 and what I need to do to increase my 135 to 150hp.I have perused manuals and parts catalogues and see no difference.Anyone who has done this might like to share their finds.
Many thanks
:confused:

Change the carbs to WMH 47's and get rid of your advance module. Set your max timing to 22-24 degrees and you'll out run any stock 150 on the lake.

If you want to have some fun, after you upgrade, change your cowling stickers to 115's and then go challenge another 150. I sent a guy off with his head hangin low last weekend.... I'm so bad...LOL...:D Watch out for the XR's and the ProMax's they'll whip you silly.

FYI, I changed the stickers to keep from raising eyebrows and attracting the local boat sherriff. My boats only rated for a 115.
004.jpg
 

IGIFF

Cadet
Joined
Mar 22, 2010
Messages
26
Re: Merc 135 upgrade

Thanks for the quick response mate,
Is my setup being a 93 model the same as yours and by advance module,do you mean idle stabiliser.Thanks again.
Ian
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
28,074
Re: Merc 135 upgrade

So your Water Police cannot tell the difference between an inline 4 and a V6 motor cover?
 

j_martin

Admiral
Joined
Sep 22, 2006
Messages
7,474
Re: Merc 135 upgrade

Thanks for the quick response mate,
Is my setup being a 93 model the same as yours and by advance module,do you mean idle stabiliser.Thanks again.
Ian

There were idle stabilizer modules, and advance modules, and combination modules.

If your Max timing spec is 18 or 19 degrees, then the "advance" feature is in your module.

They would advance the timing from 19 to 23 degrees at about 5000 rpm, then retard it to 17 degrees at 5500 rpm. Kind of a poor man's rev limiter.

hope it helps
john
 

sschefer

Rear Admiral
Joined
Nov 13, 2008
Messages
4,530
Re: Merc 135 upgrade

So your Water Police cannot tell the difference between an inline 4 and a V6 motor cover?

Well, no.. but then again Merc did produce a 2.5L 115 so whose to tell. Kinda of like someone on here posting a problem and not giving us the serial number of the engine. Haven't seen a water cop with a Merc serial number breakdown list yet.
 

Dukedog

Captain
Joined
Oct 6, 2009
Messages
3,439
Re: Merc 135 upgrade

Well, no.. but then again Merc did produce a 2.5L 115

Just wonderin' when this took place.............:confused:

Guess we're lucky. Our cops don't care whatcha got on tha back BUT tha insurance company sure does.................
 

IGIFF

Cadet
Joined
Mar 22, 2010
Messages
26
Re: Merc 135 upgrade

Thanks guys,now can you tell me what merc takes WMV47 carbs,I don't need to worry about motor size,my boat is rated to 225,that is why I want to uprate the power,I figured on an old boat it was cheaper than replacing the whole motor.
 

sschefer

Rear Admiral
Joined
Nov 13, 2008
Messages
4,530
Re: Merc 135 upgrade

Just wonderin' when this took place.............:confused:

Guess we're lucky. Our cops don't care whatcha got on tha back BUT tha insurance company sure does.................

The year was 2000, it was a 2.5L V-115 DFI serial numbers were 0G960500-0T178499.

My insurance is fully aware of the horse power that I am running. It's on my policy as 200hp. My boat is insured for loss at 10,000.00 above NADA. They did a hull survey and determined it was indeed in "As New" condition and rated the engine weight at a Max of 450lbs. The original plan 2 years ago was to run a 150 Yami. The survey makes special note of the multi-directional Carbon Fiber re-inforced transom and the addition of non-saturating floation in the bilges. So your next question is probably if my insurance is high.. Yes, it is, and I happily pay it.

The coast guard will not budge on the method they use regardless of what was done to the boat. Since it was a production boat originaly, the production plate stays.

The Coast Guard method is based on a generally acceptable displacement calculation. It is flawed but it works to protect the broader majority of boaters and you don't have to be a rocket scientist to do the calc's.

So, taking the risk that they can do math but don't know every make and model ever produced by all manufacturers, I put the 115 stickers on it.

If they take the top off, the air box sticker say's it's a 135, the flywheel sticker say's it's a 200, the serial number off the mid say's it's a 150, and the freeze plug on the block say's nothing since I changed it.
 

IGIFF

Cadet
Joined
Mar 22, 2010
Messages
26
Re: Merc 135 upgrade

I seem to have sparked a bit of a debate.All I want is to turn a very good low hour 1993 model 135 into a 150 as the motor came on a boat I bought cheap and is a little underpowered as it is rated for 225hp.I need to know what carbs to use,I am in Australia and nobody seems to know what motor the WMV-47 carbs come off,the wreckers want to know the horsepower before they start searching.Is there another more common carb I can use to get the same power output or do I simply shop for 150 carbs and get the same result.
Thanks a lot
Ian
 

sschefer

Rear Admiral
Joined
Nov 13, 2008
Messages
4,530
Re: Merc 135 upgrade

That would be WMH-47 and they are correct for 92-96 150's. The WMV's came after the WMH's. You can run them also as long as they are for a 150 and jetted correctly. A Merc Shop Manual would help you find the right ones for your engine.

Like I said in my original post all you need to do is change the carbs and get rid of the advance module to add the extra hp your looking for. But like I also said, there's probably not going to be a lot of difference in overall performance so don't set your hopes too high.

P.S. Sorry about the hi-jack.. DD get's me wound up once in awhile... He's always doing that to me. It's kind of a game we play to stay on our toes.. It's one of the nicest things about this board.
 

IGIFF

Cadet
Joined
Mar 22, 2010
Messages
26
Re: Merc 135 upgrade

Thanks for all the input,will see if I can pick up a set of carbs.
Ian
 

Dukedog

Captain
Joined
Oct 6, 2009
Messages
3,439
Re: Merc 135 upgrade

sschefer, your just full of it. They have NEVER built a 2.5 V6 115 of any kind period. Tha first number is for a 9.9 hp motor. Tha second shows it doesn't exist......

Tha WMH 47 is an early (maybe '95, '96 ) 225 3.0 liter carb and way to much for his motor.........

Here's a list of carbs that will work fine on your motor. These are 150 hp 2.0 liter carbs which is really all ya need if your not gonna go inta tha motor. These will be jetted right unless someone has been inta 'em and changed things................

WMH 7,9,12,13, and 23
WMMV 2 and 2A (these may be superceded to a different number in later years)
 

sschefer

Rear Admiral
Joined
Nov 13, 2008
Messages
4,530
Re: Merc 135 upgrade

sschefer, your just full of it. They have NEVER built a 2.5 V6 115 of any kind period. Tha first number is for a 9.9 hp motor. Tha second shows it doesn't exist......

Tha WMH 47 is an early (maybe '95, '96 ) 225 3.0 liter carb and way to much for his motor.........

Here's a list of carbs that will work fine on your motor. These are 150 hp 2.0 liter carbs which is really all ya need if your not gonna go inta tha motor. These will be jetted right unless someone has been inta 'em and changed things................

WMH 7,9,12,13, and 23
WMMV 2 and 2A (these may be superceded to a different number in later years)

You just love doing this don't you... Check again... You're refs might not be as up to date as mine. In any case, we're hijacking this guy's thread.. Take it to a PM if you want to discuss it further.

Steve
 

Dukedog

Captain
Joined
Oct 6, 2009
Messages
3,439
Re: Merc 135 upgrade

Didn't hi-jack nothing. Gave him tha right information for tha carbs he can use on his motor................
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,930
Re: Merc 135 upgrade

This is from my carb list that will also work for you:
WMH series....13B,23, and 31.
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
Re: Merc 135 upgrade

sschefer, your just full of it. They have NEVER built a 2.5 V6 115 of any kind period. Tha first number is for a 9.9 hp motor. Tha second shows it doesn't exist......

Err, yes they did....

attachment.php
 

Attachments

  • 2.5V115.jpg
    2.5V115.jpg
    70.2 KB · Views: 0

Dukedog

Captain
Joined
Oct 6, 2009
Messages
3,439
Re: Merc 135 upgrade

Guess I need ta re-boot. My Midas and Brunswick shows first number as 9.9 and second as non-existant. Is this something other than U.S.? Now you've really got tha "courious George" going........................

Bring back tha Microfiche............:eek:
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
Re: Merc 135 upgrade

Guess I need ta re-boot. My Midas and Brunswick shows first number as 9.9 and second as non-existant. Is this something other than U.S.? Now you've really got tha "courious George" going........................

Bring back the Microfiche............:eek:

Microfiche???? RUN AWAY!! :eek::eek::eek:

I got the same for the serial numbers but.... This is a serial number group, not serial numbers for those particular engines.
 

Dukedog

Captain
Joined
Oct 6, 2009
Messages
3,439
Re: Merc 135 upgrade

I truly "bleed black" (actually alodine) but sometimes their paper trails really suck..........:mad:

After some serious diggin' (thanks ta Faz) they did build it for one year looks like, 2000. A real 400+ lb. pig of a Saltwater Series. Guess it was their EDSEL...........

sschefer- one
DD------- 0 (next time sschefer :redface:)

Microfiche = old dog :p
 
Top