What for kind Merc v6 Engine is this ?

[easy]

Hello im Ray from the netherlands

And i bought this piranha miura boat with this engine
Can some one see what type engine this is

idle at 600 675 rpm

Serisl number is OC273729

















All information on this engine is helpfull for me

[Toffy]

Think it's a 1990 200hp V6 3.0 liter, but I'm not sure.
I doubt Mercury made 3.0 liters that only produce 200hp. Are you sure the 3.0liter on the cowl is correct ???
The "O" at the beginning of your serial number is probably a leading zero, and should therefore be ignored.

[easy]

Originally Posted by Toffy

Think it's a 1990 200hp V6 3.0 liter, but I'm not sure.
I doubt Mercury made 3.0 liters that only produce 200hp. Are you sure the 3.0liter on the cowl is correct ???
The "O" at the beginning of your serial number is probably a leading zero, and should therefore be ignored.

2.0 liter is on the cowl

[Tony Davis]

OC273729 is shown as a 135/150/175/200 2.5L motor

[Toffy]

ahhhh... than it's ok
First 2 sites in following link clearly show it's indeed a 1990 200hp V6.
http://forums.iboats.com/showthread.php?t=264123

Maybe someone can back me up on this.
Or just ask any Merc dealer, he should be able to tell you for sure within a heartbeat

[Tony Davis]

here it is.............

[Techteam]

Looks like a 135 to me, vertical front end. It's definately not a 200 with that layout heads etc.

[mattboy]

looks very much like a 135 to me, and in the pic of the flywheel cover it has V135 on it??????

[gonein60seconds]

2L 135 for sure.

[gonein60seconds]

It can easily be tuned up to a 150 by changing a couple of parts as it is the same block, ie carbs, exhaust plate and timing, hope this helps.

[steve h]

that block aint no 135 its old 150/1750 pre 82 different head bolt pattern

[Techteam]

Originally Posted by steve h

that block aint no 135 its old 150/1750 pre 82 different head bolt pattern

So I looked hard at that too Steve. I don't agree. I am going to stick my neck out and say very very early version 2.5 vertical front end 135 with the crap heads that made a very brief appearance. Hell the forum is so boring at the moment I'll put a tenner on it. I give it to you at records when you take Bob's record back!

[grandmas denture]

Originally Posted by steve h

that block aint no 135 its old 150/1750 pre 82 different head bolt pattern

... yup, heads are old, but used till 1987, cowl doesnt match to them
... check out the main jets, if it is 2.0l, .050 is hp135, .062 is hp150

Product Information
Serial Number: 0C273729
Model Number: MER 1135412JD
Description: ME - 135 ELPT

[easy]

Thx for all information to this point.

I checked the jet of the carburator and its a 078

So its not clear wich model it is

[grandmas denture]

Originally Posted by easy

Thx for all information to this point.

I checked the jet of the carburator and its a 078

So its not clear wich model it is

... sure it was the main jet ?
... 078 sounds like vent jet @ 150

[easy]

This is the jet i screwed out

[grandmas denture]

Originally Posted by easy

This is the jet i screwed out

...
... .078 was fitted at carb-type wh3-x, wh3-xa and wh5-x
... which carb is fitted ?

[Renegade]

Is the motor a bitsa?

[grandmas denture]

... in doubt, check out the mercury big manual (3336pages~400mb)

[steve h]

Originally Posted by Techteam

So I looked hard at that too Steve. I don't agree. I am going to stick my neck out and say very very early version 2.5 vertical front end 135 with the crap heads that made a very brief appearance. Hell the forum is so boring at the moment I'll put a tenner on it. I give it to you at records when you take Bob's record back!

£100 says no newer than 83 block with some newer electrics grafted on,and head bolt holes are on side of cylinder liner,as for coniston rather have holiday than waste my time up there