03 Procraft 200 EFI Merc (blown)

[fishinwrench]

Factory tuning for the lowest possible emissions is the killer for 2-stroke engines.   The more "efficient" the engine consumes fuel and oil....the shorter its expected life will be.  There's just no getting around that. So for the majority of blown 2-stroke outboards you can thank our lovely Environmental Protection Agency.

Throttle response, lighter weight, HP per cubic inch, fewer moving parts, and generally a much longer life are the benefits to 2-stroke induction.   

Show me a 17 year old 150-200hp 4-stroke outboard.   Ain't none out there.   And there won't ever be any either. 

 

[snagged in outlet 3]

34 minutes ago, fishinwrench said:

Factory tuning for the lowest possible emissions is the killer for 2-stroke engines.   The more "efficient" the engine consumes fuel and oil....the shorter its expected life will be.  There's just no getting around that. So for the majority of blown 2-stroke outboards you can thank our lovely Environmental Protection Agency.

Throttle response, lighter weight, HP per cubic inch, fewer moving parts, and generally a much longer life are the benefits to 2-stroke induction.   

Show me a 17 year old 150-200hp 4-stroke outboard.   Ain't none out there.   And there won't ever be any either. 

 

That just blows my mind every time you talk about this.  

[fishinwrench]

1 hour ago, snagged in outlet 3 said:

That just blows my mind every time you talk about this.  

It blows my mind too.  The fact that any highly schooled engineer even considered a multi-cylinder, vertical crankshaft, 4-stroke engine ....and then designed it light enough in weight to be mounted on the transom of a boat.....   And then a whole gaggle of other highly trained engineers actually went along with, and supported the idea?????

I mean WTF?  

Helicopter science, that's what it is.  It's as if nobody paused to consider how short the average life of a helicopter motor is. And why.  😵

[Devan S.]

And yet people still buy them, spend hundreds trying to get 1 or 2 mph via propping and run all out everywhere they go. 

Its effectively planned obsolescence.

[fishinwrench]

I mis-spoke/posted on the sonar units, They are Lowrance Elite 7's.    

My bad.

[MrGiggles]

16 hours ago, fishinwrench said:

It blows my mind too.  The fact that any highly schooled engineer even considered a multi-cylinder, vertical crankshaft, 4-stroke engine ....and then designed it light enough in weight to be mounted on the transom of a boat.....   And then a whole gaggle of other highly trained engineers actually went along with, and supported the idea?????

I mean WTF?  

Helicopter science, that's what it is.  It's as if nobody paused to consider how short the average life of a helicopter motor is. And why.  😵

Makes you wonder what makes them so unreliable.

You have 4 cylinder motorcycle engines that will spin 16,000 RPM, and still last 100k miles even if you beat on them.

In every other application 4 strokes will beat the pants off of 2 strokes in terms of reliability and longevity. You rarely see an old chainsaw or dirt bike that hasn't had a couple top ends put on them, but a 60 year old outboard is often good to go with some carb work.

[fishinwrench]

2 minutes ago, MrGiggles said:

 

In every other application 4 strokes will beat the pants off of 2 strokes in terms of reliability and longevity.

Going vertical just doesn't favor 4-stroke design.  Your uppermost cylinders are always going to be hotter.... because heat rises.    An outboard relys on lake water for cooling. With 2-stroke motors tolerances have more leeway, and tolerances change with engine temperature.   4-stroke outboards are loaded with nylon and other blends of plastic that are internal components of the engine, to save weight.    

Other than the oil pump drive gear on V6 Mercury's....there isn't any plastic inside the powerhead of a 2-stroke outboard.  

If overall weight wasn't a major factor then 4-stroke outboards could possibly be very reliable.  But for now I just see them as being a very expensive THROW AWAY outboard.  And in this world of recyclable things I just see it as a huge waste of otherwise good materials.    

Nobody gives twoshits about clean burning engines when they are 60 miles off the coast and a storm is approaching.   

[dwiebenga]

I bought this boat.  I am excited to see the finished product when "wrench" gets it back up and running!

See you on the water

[fishinwrench]

15 minutes ago, dwiebenga said:

I bought this boat.  I am excited to see the finished product when "wrench" gets it back up and running!

See you on the water

Just ordered your powerhead a few minutes ago.   They are dealing with some hurricane damage there but assured me that it would go out ASAP (probably be 3-5 days later than usual).   🤷