Johnson 150 vs Suzuki 200???

[adm1476]

So I have a 1987 Johnson 150, runs fine everything works good. I am getting another boat that needs an engine. I can get an 80’s model Suzuki 200 I guess it is a DT200. Oil injected 2 stroke. Both engines are unknown hours. Both run. Given the choice which is better? It will be going on a 20ft sea ox that has a solid transom with a bracket on it. Boat had a Suzuki o

 

[racerone]

Do you have a trusted Suzuki shop in your area ?-----Planning on doing some of your own maintenance ?

 

[adm1476]

Probably both. There is a shop here and o will do some of my own maintainance

 

[dingbat]

You’re talking 30 plus year old motors.

The first thing I’d do is to go through the parts list for each motor looking for NLAs.

It only takes one to be done.....

 

[adm1476]

I know nearly all the parts for Johnson are still available. I don’t know about the Suzuki.

 

[Texasmark]

This is old but I am hitting it anyway. Back in 1989 I bought a Ranger Bass Boat with a Mercury I6 "Direct Charged" (very economical even though it wasn't a Looper) and the dealer was selling "Cross Flow" Johnson GT150 engines.

I bought a new Johnson Cross Flow 125 back in 1972 and it had all the Johnson goodies of the time except Loop Charging.....being a 4 cylinder, they hadn't figured out how to get the loop to work on anything but 3 cylinder (multiple) engines at the time (opinion) and I know what kind of gas a/my cross flow engine uses/used. Suzuki I will bet you is "loop charged". That in itself would put me in the Suzuki.

 

[racerone]

??------If you are producing crossflow engines and they are selling well.-----Then you do not have to figure out how to cast looper blocks.------And if you can cast a 3 cylinder looper you certainly have the people to cast a 4 cylinder looper.-----Or do you know where the V-4 looper blocks were cast ?-----In the USA or somewhere else ?-----OMC was using " looper technology " in the 1950's on some small engines.----Not rocket science.

 

[Texasmark]

??------If you are producing crossflow engines and they are selling well.-----Then you do not have to figure out how to cast looper blocks.------And if you can cast a 3 cylinder looper you certainly have the people to cast a 4 cylinder looper.-----Or do you know where the V-4 looper blocks were cast ?-----In the USA or somewhere else ?-----OMC was using " looper technology " in the 1950's on some small engines.----Not rocket science.

It wasn't the casting, it was the timing. The whole idea of the looper is the reflected exhaust timing (called exhaust tuning) that allows the incoming charge to remain in the cylinder (since there is no deflector like in cross flow) till it combusts. 120 degree engines work great.....notice larger HP engines came online quickly and were loopers and were a pair of 3 cylinder engines on one crankshaft? 90 degree 4 cylinder engines were out of time for the initial technology;.......per bla bla bla from the mfgrs at the time.

 

[racerone]

They had V-4 crossflow engines with exhaust tuning.-----The built 4 cylinder V-4 loopers as well with exhaust tuners cast right into the block.------The V-4 / V-6 looper blocks may have been cast in the UK where the technology was available I believe.

 

[flyingscott]

It wasn't the casting, it was the timing. The whole idea of the looper is the reflected exhaust timing (called exhaust tuning) that allows the incoming charge to remain in the cylinder (since there is no deflector like in cross flow) till it combusts. 120 degree engines work great.....notice larger HP engines came online quickly and were loopers and were a pair of 3 cylinder engines on one crankshaft? 90 degree 4 cylinder engines were out of time for the initial technology;.......per bla bla bla from the mfgrs at the time.

You do realize.the.loop charging is on the intake side of.the motor. The port is angled so that the fuel charge goes up towards the plug. That replaces the deflector on the piston. Yamaha built 90 degree 4 cylinder loopers in the early 80s the 115/130 blocks. The OMC V4s crossflow motors absolutely had exhaust tuning. Remember the bubble back exhaust. In 1985 I believe OMC built a 90deg looper 120/140 hp motors.

 

[jimmbo]

Loop Charging is also very dependent on the location of the Exhaust Port(Flat Top Pistons had a lot to do with it) so it is not strictly on the Induction Side.

The Suzuki V6s from the 80s were very Strong Engines and had no Problem equaling or beating the OMC and Merc V6s, I drove a couple of them in 86, and was having Buyer's Remorse over my Merc.

1985 was the first year for the OMC Looper V4s and V8s, the :Looper V6s came out a bit later. .

 

[Texasmark]

They had V-4 crossflow engines with exhaust tuning.-----The built 4 cylinder V-4 loopers as well with exhaust tuners cast right into the block.------The V-4 / V-6 looper blocks may have been cast in the UK where the technology was available I believe.

I know the 60 degree V6 engines were cast by a popular race car facility in the UK.........not sure on the facility but the Ford Shelby comes to mind....thinking.......Shelby and UK......thinking...... and V engine casting facilities......all ringing a bell.

 

[Texasmark]

You do realize.the.loop charging is on the intake side of.the motor. The port is angled so that the fuel charge goes up towards the plug. That replaces the deflector on the piston. Yamaha built 90 degree 4 cylinder loopers in the early 80s the 115/130 blocks. The OMC V4s crossflow motors absolutely had exhaust tuning. Remember the bubble back exhaust. In 1985 I believe OMC built a 90deg looper 120/140 hp motors.

Yes sir the inlet was via a hole in the piston, but the charge of one cylinder was partially reflected back into the exhaust port of the previously firing cylinder, keeping the charge in the cylinder longer. I didn't design the things, I just recall what I read in sales brochures at the time since fuel economy was a big deal back then and OMCs fuel economy just sucked......and I was an OMC guy at the time.

My '72 125 V4 was crossflow and did have tuned exhaust tubes down in the mid section among other things which helped the fuel economy greatly over the predecessor, like the Fat 50. I could sit in a stern, jump seat while my wife was doing her WOT thing and you could hear them resonating....sweet music.