Evinrude 115Hp V4 Project Rebuild / Repowering a Fourwinns Fling Turbo jet boat

[Jon NL]

Sorry i should clarify

The above diagram is a 115HP turbojet that has the telltale coming from the top of the head and empties into the exhaust muffler (whatever it is called) this is water being pushed from the JET PUMP up to the motor

The transplant motor is a 100HP outboard that will give up its power head to mount onto the top of the jet pump. The 100hp has a telltale that runs from the exhaust lower corner up over the a bank of cylinders and then out. (NOT FROM THE HEAD) like the turbo jet. This comes from the water pump in the outboards leg ?

So the research comes from

Johnson/evinrude adding a tell tale Verified

Adding a water pressure indicator to an OMC outboard. Tell-tale, tale-tell, that little squirty thing -- later model OMCs have 'em and you want one on yours. The water pump is a crucial element in preserving the health of your outboard. It's vitally important to know that it's functioning...

forums.iboats.com

there is a OMC service bulletin referenced in the above link with instructions on adding the telltale to the outboard motor due to over heating and air locking.

Thanks

Jon

 

[Jon NL]

 

[Jon NL]

This is a picture from the above link, as my 100hp is a outboard motor it does not have the two fittings on the water jacket onto of the head to hook up to the exhaust like the turbo jet. My telltale is like the picture

 

[racerone]

The service bulletin came out in 1994 to deal with the 3 cylinder 56 cube motors.------Many folks have gone overboard and applied this to every outboard !!

 

[Faztbullet]

Plug the fitting on exhaust cover and: (A) drill and tap heads for crossover plumbing (B) Swap heads off old engine.

 

[Jon NL]

Just came up local 1980 80hp for $250

 

[Faztbullet]

Yer going backwards...need a block with exhaust hump.

 

[Jon NL]

just daydreaming lol but the original motor that was in the boat was a 115hp can i take the carbs and exhaust off it as the crank is toast and make the 80hp into the 115 ?

 

[racerone]

The 85 HP block has smaller intake ports on sides of cylinder.----Why are you looking at another block ?----I thought you already picked up a motor ( $300 screach tokens ) to use in your project.

 

[Jon NL]

@racerone I did it’s sitting all nice on the stand out in the garage, almost 2 nice to take the motor out of .............

When I seen This powerhead 85hp I wondered if I could bolt my 115 parts on and make it work as I am sure I can get this 85 for a song.

Jon

 

[racerone]

I picked up some " nice looking " motors too.----For a song / box of beer.----Still needed rebuilding.----Have you done a compression test on that nice motor ?-----I get mixed up sometimes 12 beer is a " case " or a " box " in your hometown ?

 

[Jon NL]

I picked up some " nice looking " motors too.----For a song / box of beer.----Still needed rebuilding.----Have you done a compression test on that nice motor ?-----I get mixed up sometimes 12 beer is a " case " or a " box " in your hometown ?

A case of beer is better then $ in most places on the ROCK

 

[racerone]

I fully understand the concept.