115 evinrude

[rcmslm]

I realize this is not an outboard but same powerhead.I have a 95 turbojet model 115tjeoa,but the block is a flat back,dual aluminum carbs.I was wondering if it is a true x flow 115 or is it a 90 hp that the previous owner swapped in.The only serial number visable is the qtr size plug on port side 394451.Or could it be an older 115 block that was swapped in?

 

[emdsapmgr]

Likely the model number is E115TLEOA. This represents the 115 hp bubble-back, crossflow engine. The powerhead was probably changed at some point, since the flatback engine is also a crossflow, the lower hp version-probably a 90 hp. It bolts right up in place of the original 115 hp engine. The 394451 is not a serial number, but actually a legitimate OMC part number. Description: PWHD SEA DR 84-86 You have a model number that does not match the actual powerhead number or year.

 

[rcmslm]

That's what I was afraid of.The model number is on the lower hull by jet drive.It is a 115tjeoa serial 03850082.The parts I ordered thus far do fit.Head gaskets,voltage regulator,thermostats,valve body etc.Which from my understanding the 90 is basically the same engine.Is there any numbers on the block to know for sure what I have?Could it be an older eighties crossflow 115?

 

[racerone]

Many different years would fit.----Those V-4 blocks were very similar as far as " fit -up " is concerned.

 

[emdsapmgr]

You may have luck determining the exact type of engine. There is a casting plug that sits atop the engine. Probably painted over, but it has the model and serial number stamped from the factory. See attached. Problem is that if it's a warranty/replacement powerhead, it may not have much good information. But it's worth a look. This is a pic of a 1975 135 casting plug

 

[rcmslm]

Is it still possible to be a 115 even though it is a flat back?

 

[emdsapmgr]

Some of the older 115's were flatbacks. Model year 1984 and prior. Those were hp rated at the crank and made 10-12% less hp than a prop-rated 1995 115 hp powerhead. You can have a look at the throat size of the carbs. That may tell you something. If it's got the large 1 5/16" carbs, those would probably have been from the original 95 115 hp block. The size is cast into the front flange of the carb face.

 

[rcmslm]

I cleaned the welch plug on top of port side cylinder and came up with 394451 rph which indicates a replacement block.I didn't see the size of carbs on the mounting flange.The carb tags are still there which are 393771 and 393772.If the replacement block is a 115 but put a flat back on it what would that make it on hp rating?

 

[Auxlarry]

My '85 OMC Sea Drive 115hp is a flatback!

 

[rcmslm]

I had to pull bottom carb to replace primer hose and it says on both 1 3/16 carbs.So I must have a 90hp.