1983 evinrude 115 v4.

[bandt]

I recently purchased this engine for my project bass boat(1989 dynatrac 195)and it had been sitting for 4 years in a garage on a rack. I installed on boat and have had it running twice with muffs. Now it will not fire and has spark on only two lower cylinders.Have cleaned all plugs and replaced all spark plugs I have a cd book that is some help but I have not been able to find the problem. By the way all cylinders have about 100 to 110 compression. I have cleaned both carbs

 

[James R]

Re: 1983 evinrude 115 v4.

Most likely the power pack but you should try to eliminate coils and stator by resistance checks.

 

[emdsapmgr]

Re: 1983 evinrude 115 v4.

That engine has dual identical power packs. One controls the spark to each head. Unfortunately, you have lost spark on one cyl on each head. If it is a pack, then you will need two. As James mentioned, those packs are expensive and it could something else-like a timer base or stator. You may wish to check out/test all those ignition parts before purchasing anything. You can find some good ignition troubleshooting at the cdi.com website. You will find a special "peak reading" voltmeter will come in handy during testing. Your compression sounds fine for that year.

 

[boobie]

Re: 1983 evinrude 115 v4.

Before you replace both packs I'd make sure the timer base is okay. Check the wiring and connections going to it. Also the ground wires for the packs.

 

[bandt]

Re: 1983 evinrude 115 v4.

I guess I am in way over my head and do not want to do it wrong so I have an appt with shop to take my boat there and he will tell me what I need for 25. It pays to have friends on the internet and in the shop. Thanks for all your input. I tried today for 2 hrs but could not identify the problem.I will keep you updated.

 

[bandt]

Re: 1983 evinrude 115 v4.

Well I heard from the shop today and I have no compression on lower two cylinders. I will bring it back home tomorrow and pull the heads to see how bad it is. hopeful it is blown headgaskets. This engine was setting for 4 years. I did have it running for a few minutes so I am not sure what I will find.

 

[emdsapmgr]

Re: 1983 evinrude 115 v4.

Maybe I mis-read your first post. You said you had 100-110 lbs compression on all cylinders. What happened between the time you took the first readings and the new readings from the shop?

 

[bandt]

Re: 1983 evinrude 115 v4.

I ran the engine twice for a total of maybe 5 min. shut it down and it would not start again. I took the first compression check before I started the engine and never thought of retaking them.I hope its gaskets but of course could be pistons. I will get the boat home today and I am tied up for the rest of today and tomorrow with test at hosp. I will remove heads friday.

 

[bandt]

Re: 1983 evinrude 115 v4.

well I pulled both heads and found stbd lower piston has a burned spot about an inch long and on edge of piston.Port piston (lower) appears to have something bouncing around inside and head pitted the piston is also .Now I have to decide overhaul or new motor.Maybe try to find rebuilt powerhead, I have ovehauled gas engines bu not out board. I have a basement workshop so I have tools and ability.suppose I could buy a used engine but if I do 2 new pistonsand all four rings i should end up with a good engine for less than purchasing another used unknown. Is this logical thinking? or any suggestions. at this point I can see no cylinder damage.

 

[emdsapmgr]

Re: 1983 evinrude 115 v4.

Sounds like you have two bad holes on the engine. Interesting that they are both the lower cylinders. Possible problem with the fuel flow on that bottom carb-and it took out both cylinders. I'd pull that bottom carb apart and check the main jets to make sure one or both are not restricted with debris-affecting fuel/oil flow. The port cylinder probably chewed up a ring and pieces of it got into the combustion chamber. Then that happens the ring bits get pounded between the piston crown and the firing face of the head. If you have no aluminum transfer from the piston onto the cast iron cyl walls, that's a good sign. Yes, you will need at lest 2 pistons and 4 ringsets. A machinist can tell you if the cyls are tapered enough that they need to be overbored (and oversize pistons.) Best not to reuse the head that has the dents on it. Try to find a replacement head. Unless you know the history of a replacement powerhead, you could be purcasing someone else's problem. If you overhaul your own you know exactly what you have.

 

[bandt]

Re: 1983 evinrude 115 v4.

That is what I have decided I will rebuild it myself. I have already started disconnecting and remove all I can and take the powerhead to my basement and that is my winter project.I am sure I will learn a lot. Fortunately a neighbor is a mechanic at a marina and he will visit to insure I am OK. I will get parts thru him also.I will update as I progress. Thanks for the replies and both carbs will also be rebuilt.

 

[emdsapmgr]

Re: 1983 evinrude 115 v4.

It's always helpful to have a neighbor who is an expert!

 

[bandt]

Re: 1983 evinrude 115 v4.

unfortunately the neighbor is busy today on the lake winterizing for folks who live on the lake. I have carbs and all cables removed also removed the cowling under the bottom housing. Now I am not sure which bolts to remove to lift powerhead. I guess I will wait to be sure.Also you were right on,the bottom carb had plugged low and high speed jets both on same side as burnt piston.

 

[emdsapmgr]

Re: 1983 evinrude 115 v4.

OMC uses a mix of studs with nuts and long bolts to hold the powerhead onto the exhaust housing. You may be able to determine just what needs to be unbolted from the factory exploded parts diagram for your engine. Check out the factory website: epc.brp.com

 

[bandt]

Re: 1983 evinrude 115 v4.

well thanks for all the help. The engine has four bad holes ad has been used in salt water and never rinsed. all passages are corroded. Motor is not worth rebuilding. So I am looking for a 75 to 125 motor or sell the boat and trailer and start over. Its a nice dynatrac195 with trailer and I sure was looking forward to fishing in it.

 

[bandt]

Re: 1983 evinrude 115 v4.

well things sure change overnite. I found a 1986 johnson 115 but it does not have tilt and trim. I was wondering if I can take the tilt and trim off the 83 115 and install it on the 1986. Is that doable or will it not work?

 

[boobie]

Re: 1983 evinrude 115 v4.

Go to shop.evinrude.com and compare part #'s between the years.