He Lied !!! rotten Sod!!

[Franki]

Hi Guys, <br /><br />I just answered an add for a 115HP 1975 outboard which seemed like a very good deal..<br /><br />I have a 100HP V4 Johnson that I have been chasing the full tilt/trim system, so I thought this would be a great way to get some spares to boot.. I got the whole deal for $170 USD. (the tilt trim does work.)<br /><br />I was suspecious about what year when he told me it was electric shift gearcase,, which can't be right because as I understand it they stopped making those gearcases around 72 didn't they?<br /><br />anyway, I just checked the numbers and it turns out its a 1969 85HP Evinrude.. which is quite different from what he told me.<br /><br />My question is,.. the powerheads look identical, as do the legs and gearcase..<br />the only visable difference is the cowling and the controller.. the controller has 3 buttons instead of my forwards/backwards throttle lever.<br /><br />Are the powerheads and grearcases the same? can they be interchanged? if I need to put the 85HP powerhead on my OB, and use my exhaust and carbs, will it still be a 100HP??<br /><br />This guy told me that the only difference between that whole range 80-140hp from roughly 68-72 was the electrics, carbs and exhaust, and he is right from the look of it, since its hard to tell them apart, the evinrude even had the same powerpack my 3 year newer Johnson has(at least it looks like it..)<br /><br />Can anyone give me any info here? are the legs and powerheads the same?<br /><br />I am not really upset that much, I got an entire working tilt/trim pump, rams and switch from this deal, so it was worth it just for that considering the cost of replacements, but it'd be nice if the other parts were usable.<br /><br /><br />kindest regards<br /><br />Frank

 

[Chinewalker]

Re: He Lied !!! rotten Sod!!

Hi Frank,<br /> The older V4 is probably the smaller bore model - about 92 cubes. I think the 115/135/140 versions were all the bigger bore 99 cuber. I'm not certain which block the 100s used. What year is your Johnson? If it's an electric shift model, then yours would have a single lever control - Evinrude electrics had the push-buttons. I would imagine there is some compatibility between the 85 & 100 electric shifters, at least as far as electronics, linkages and probably lower ends goes...<br />- Scott

 

[Franki]

Re: He Lied !!! rotten Sod!!

Hi Chinewalker,<br /><br />Thanks for that.. like I said, the two powerheads look almost identical... and everything bar the cowling and controller is identical.. as far as the electrics are concerned, I had already accertained that they were compatable, (I'm actually trying to figure out which controller I prefer..)<br /><br />My 100 is a 72 model.. (see my name for the model number <br /><br />Is there any way I can find out one way or anther what the differences are? I will be heading over to the library to see if there are books on either of these things available..<br />other then that, I am at a loss..<br /><br /><br />rgds<br /><br />Frank

 

[novacane]

Re: He Lied !!! rotten Sod!!

i stuffed a evenrude 1965 60hp v4 on a 70<br />85hp bottom end, bolted right up

 

[alcan]

Re: He Lied !!! rotten Sod!!

Hello Franki<br />If you will post you e-mail add. I'll try and send you some imfo.

 

[Franki]

Re: He Lied !!! rotten Sod!!

Thanks Mr Alcan,<br /><br />Much appreciated<br /><br />My email is frankieh@vianet.net.au<br /><br /><br />rgds<br /><br />Frank

 

[alcan]

Re: He Lied !!! rotten Sod!!

Franki<br />If you get that email and it's ok I'll send you the same imfo on the other engine tomorrow.

 

[Franki]

Re: He Lied !!! rotten Sod!!

Thankyou Alcan,, <br /><br />that made very interesting reading.. <br />the 72 model 85 100 and 125 share many parts, but the 85 and the 100 share block, head and crank.. indicating that they guy was right, the engines are essentially the same.. now if the 69 model evinrude has the same part numbers for head, block and crank as the 72 model.. then we know for a fact that the two motors are for all intents and purposes identical as far as capacity and design.. the differences then would be accounted for by electrics and carb size.<br /><br /><br />Thanks so much for all this info, much more then I could have hoped for.<br /><br /><br />rgds<br /><br />frank

 

[Franki]

Re: He Lied !!! rotten Sod!!

Now this is really very interesting..<br /><br />I looked at all the paperwork that Mr Alcan nicely sent me and it shows some funny stuff.<br /><br />Firstly, the 69 Evinrude 85HP and the 72 100HP have different block part numbers. <br />and yet they have the same part number on the head gasket.. which means it very likely has the same bore.. <br /><br />Did they change the part numbers each year just to indicate new parts even when they were the same??<br /><br />Is there anyway to tell without stripping both and getting out the micrometer??<br /><br /><br />rgds<br /><br />Frank

 

[daveswaves]

Re: He Lied !!! rotten Sod!!

Hey guys, I had one of the 85 HP evinrudes and was in touch with a fellow who was the factory rep when they were first out. He told me that the only difference between the 85 and the 100 was the reed plate, they choked it down to get 85, it was the hey day of the horsepower race and they had the 100 HP figgured out but needed to market an 85. Hence the plate change.

 

[alcan]

Re: He Lied !!! rotten Sod!!

Hi Franki<br />The bore is indeed the same, but the stroke is differnt. I would say that the port timing is probably differnt also. Just a guess.

 

[Franki]

Re: He Lied !!! rotten Sod!!

bear with me here guys.. I want to reason this out..<br /><br />We have established that in 1972, the 85 and 100HP models had the same block crank and heads.. which is what the material Alcan sent me said.. and it ties in with what daveswaves said..<br /><br />Now the 69 evin 85HP has the same bore, but potentially different stroke would the stroke be less or more? if the 85HP 72 is just a detuned 100, then I'm guessing the 69 model motor would have a smaller capacity, (unless it to is a detuned 100HP)<br /><br />Since newer motors seem to produce more HP from less capacity, it wouldn't the 69HP evinrude have to be the same size as the 72 model? (at least)<br /><br />I know there were no big improvments in technology between 69 and 72, but the ingnition system is very different between the two..<br />They call the powerpack on the 72 model a pulsepack, but its called an amplifier assembly on the 69.. whats the difference between the two? anyone know?<br /><br />From looking at the legs, I think I can safely say that I can change the powerheads and other stuff over no probs, just not sure what HP motor that would leave me with..<br /><br />Guess what I am chasing is bore/stoke/head chamber capacity comparisions between the two.. I am guessing that the reeds and exhaust would be swappable..<br /><br />If I can use the 69evin 85hp moter, with the 72 model, carbs, reed block and exhaust assembly, then I should end up with a 100hp or thereabouts..<br /><br />Since both these motors were rated at the flywheel instead of the prop, what I really have here is a 90HP and a 75 or thereabouts..<br /><br />Just trying to find out what my options are..<br /><br />If they are not interchangable, then I will tidy up the evinrude 85's powerhead and sell it... keep just the leg for a spare..<br /><br />Thanks for all the help guys, if you know where I might find displacment details on the two engines, I'd really love to hear it..<br /><br /><br />kindest regards<br /><br />Frank