Should this be the death

[AFishin69]

Okay... guys i got the engine back from the Mecahnic. I had a rouhg idle and as I feared one cylinder was low. this is a 73 Evirude 135 V-4. the compression goes 80, 120, 130, 130. Second bad news, the lower unit which was craked I FIXED with JB weld (great stuff) now pours oil out by the prop. He told me to junk the engine.. what do you think..I am despearte and hav a limited budget, what shold I do about the cylinder he said it needs rings. Seconldy what seals are bad in the lower unit? Any guesses.?? If not anyone selling any enignes for failry cheap that need minimal work?? I have heard that you can run for awhile with a low cylinder?? What is my best bet?

 

[wayne h]

Re: Should this be the death

run it to death.i would try some decarb spray it might pick up the compression.there are not awhile lot of seals in the lower end you might want to get a kit and change them all. if you dont have monet for a new engine this is the cheap way to try to get more life out of your engine. the decarb spray is like 6 $ a can i would get 2 cans.do all the cylinders but really spray the cylinder with low compression good.there is a prop shaft seal that might be bad if that is the case u can change just that seal but i would put a whole kit in it since you are there.first try the decarb spray and see if that helps with the compression if it does then worry about the leak.

 

[AFishin69]

Re: Should this be the death

Where do I get lower unit kits.. for this old of a model can I do it myself?

 

[wayne h]

Re: Should this be the death

you local evinrude dealer should have them thats not an old motor hahaha i have evinrudes from the 60s and my local dealer has kits in stock if you cant find 1 i will help you.if you dont have a manual i would get 1 of them also.you can check ebay for a manual just for that motor and they might have the seal kits on there also.i would not try it without a manual.even 2 cans of decarb,seal kit and manual should not cost you more then 50$ thats alot cheaper then having a shop do it.if you are on a fixed income u can save alot of money doing things yourself.

 

[AFishin69]

Re: Should this be the death

True, how reliable will my engine be with one low cylinder?? And how much will I notice it. To clean the cylinders do I take that cover off

 

[wayne h]

Re: Should this be the death

all you do is spray the decarb (spray)in the carbs while running the engine on a water supply.it will smoke like crazy you dont stall the engine untill the cans are almost empty then you load the carbs up till it stalls. let it sit for a few hours (over night is better)then take it to the water and run her like crazy. then eather do another compression test or just clean-change the plugs.well you said it yourself it will not idle right.can you live with that???i could untill i found another engine or till she died.

 

[AFishin69]

Re: Should this be the death

Yeah,, I can live with that since I don't have enough money. Actually 80 doens't seem that low is it? I am learning as I go so this engine I guess is a good learning tool since I don'thave anything to loose! I am asking for a lower unit rebuild kit correct!

 

[wayne h]

Re: Should this be the death

yep lower unit rebuild kit-seal kit. just try the decarb you might be surprized alot of people on the board have had good luck with it.all cylinders should be within 10 psi of eachother.get a manual its the best learing tool i am a mechanic but new to outboards and learned alot from this board and reading manuals.

 

[AFishin69]

Re: Should this be the death

Thanks Wayne, I wil get back to you on that seal kit if I cna't find one. I saw one on sterndrive.com. It looks complicated down there but only say one O-ring for it to leak, out by the prop. Question could water have caused more to be worng than a seal. Thanks for the help. I just orderd my manual form Iboats.. are the pretty easy to follow?

 

[Wingshooter]

Re: Should this be the death

Lower Unit Seal Kit from "The Shad Connection"<br /><br />About $30 plus shipping<br /><br /> http://www.theshadconnection.com/cgi-bin/page.cgi?page=354 <br /><br />Part Number 182692

 

[ledgefinder]

Re: Should this be the death

It's OK to run with a cylinder that low in a pinch, it PROBABLY will just die slowly over the next 100 hours. I've had an old "backup" Homelite chainsaw that's kept running with a badly-scored cylinder for 10 years - actually seems to be getting more powerful lately.<br /><br />However, you do want to find out why the cylinder went low. A likely culprit is gummed up carbs from old gasoline (the gas gets gummy with age). Ideally you want to clean the carbs (particularly the main jet on the bad cylinder), minimally you want to run fresh gas with about a 1/4 bottle of that fuel injector cleaner they sell for $2 down at the local minimart. You have likely partially melted a piston top in the low cylinder (2strokes burn hot when run lean). To avoid further damage, and a melt-through of the piston top, you need to correct the lean condition. <br /><br />The 135s are highly-tuned. You can back off the max timing by a couple degrees and help cool it off a bit as well. There's a threaded rod that limits how far the timer base can rotate. Each full turn of the rod is 1 degree, so you want to turn it clockwise two full turns. If you have a timing light, good idea to check where the max timing is at, and knock it back a couple degrees from spec.<br /><br />You can further help your cause by running a nice short prop. If you have a typical 16'-17' boat, try a 17" pitch prop, if you're running more pitch now (17" real common, pick up an OK used one for $10). This decrease the amount your engine 'lugs', avoid detonation, and again avoid that heat.<br /><br />The lower unit's a different story. it won't live that long the way it is, leaky prop seals leak badly. But first, are you sure it's leaking? Oil out of the exhaust is common - does the lower unit fluid look 'milky'? If so you MAY not accumulate serious damage too quickly if you run it for just an hour or so at a time & replace the lube each time (the $2.50/qt Penzoil stuff at Walmart & chain auto parts stores will work fine). Best to redo the seals (kits are $40) reasonably soon. There are two threaded holes in the bearing carrier, a common harmonic dampener puller will pull it. You may need a little heat on the case (not too much).<br /><br />Have fun!

 

[AFishin69]

Re: Should this be the death

Ledge this will be my first time on a boat motor, I actually am kinda excited. How hard will it be to change the seals.. I have heard that it nots that difficult.. I am going to try and fix it this wekend, can it be doen my manual should be here by Fri.. so that is my weakend.<br />Also, the mechanic was the one that told me the gear oil was coming out as fast as he could put it in by the prop so I figure it was a seal down there that is bad, the lower unit was not de winterized (thus the cause) I got the enigine for free so I am not to upset.!

 

[AFishin69]

Re: Should this be the death

I just picked it up and the oil pours out the exhuast inside the prop. Is that still a bad leak I mean it doens't seem to hold any oil, will the seal kit fix that? They also said that it was dirty and rust form water sitting in there and they were affraid that a seal kit would not solve my problems since, that water could have expanded the whole lower unit? So should I do the seal kit? Or does anyone have a lower unit that will fit a 73 Evinrude 135? Hoe interchangable are lower units for instance would like a 115 fit a 135 ?

 

[SeaMasterZ@aol.com]

Re: Should this be the death

a manual is 40, the decarb goes about 8 a can, kits are 30 - 40, and you got her for free ... nothing ventured, nothing gained, 100 bucks and you are golden .... now, if you busted a seal boss, you gots problems ... a good machine shop can (I believe this is the term anyway) spray weld the crack and machine it, but that would probably run more bucks than a decent used lower unit ... try eBay, twin cities outboards, and internet searches for your lower unit<br /><br />80 pounds is low, but ive seen some beasts that ran a long time with virtually no pressure .. no power, smoked like chimneys, but ran! and not for nothin, but a lousy running evinrude 135 is better than most any 120 horse something else! (Im biased, I admit it)<br /><br />if you are handy, you could always knock the ridge out of the cylinder, hone it down and re ring that one hole, if the rest are fine, leave them be<br /><br />then again, re ring all of em and youll be flyin ..<br /><br />Good Luck!

 

[AFishin69]

Re: Should this be the death

Well.. I will I tell if I busted a seal, will I be able to see it when I disasemble. I guess I am taking out the prop shaft yes? Or am I just going to take the whole uint off?

 

[ledgefinder]

Re: Should this be the death

Lower units from 1973-76 85-135hp V4s will bolt on, and some of the 1977s.<br /><br />I can't tell from your description whether the lower unit case is cracked - if it is, the seal kit will do you no good. Can you take the prop off & get a good look at where it's leaking?