1967 60hp rude problems

[jeramie78]

The engine runs great at idle but at full throttle it bogs like its flooding out for about 5 minutes then slowly builds up speed and runs good after that.
I keep hearing about sync and link but there is no description on how to do this. We use the right fuel mixture and new plugs. Replaced all hoses on carbs. My buddy took it in last year for a carb rebuild and has had these problems ever since. Any help would be nice.

 

[F_R]

Re: 1967 60hp rude problems

The engine runs great at idle but at full throttle it bogs like its flooding out for about 5 minutes then slowly builds up speed and runs good after that.
I keep hearing about sync and link but there is no description on how to do this. We use the right fuel mixture and new plugs. Replaced all hoses on carbs. My buddy took it in last year for a carb rebuild and has had these problems ever since. Any help would be nice.

Even if the link & sync was off, at full throttle the distributor should be at full advance against the stop, and the carburetor throttle should be wide open and it should run like a scalded dog.

 

[a70eliminator]

Re: 1967 60hp rude problems

As FR said the distributor should be a full advance, verify that, with the engine in gear and at full throttle (not running) check and see if the distibutor is against the little rubber bumper stop full counterclockwise.
Next remove the high speed orifices and make sure they are clear, this requires a modifying a flat screwdriver (file it narrow enough to fit into the well without damaging threads) the highspeed orifices are behind the two plugs in the front of the carb, take the plugs out, the orifces recess about inch back into the threaded wells.

 

[jeramie78]

Re: 1967 60hp rude problems

ae they adjustable or do they seat in? so i know wether to count the turns or not?

 

[F_R]

Re: 1967 60hp rude problems

ae they adjustable or do they seat in? so i know wether to count the turns or not?

They are not adjustable and are to be screwed all the way in. I seriously doubt they are the problem, but won't hurt to check. Hey, maybe somebody did "adjust" them. Worse yet, maybe somebody drilled them out oversize. Some people have the false idea that driling them out makes it go faster. Actually, it makes it go slower. They should be stamped #72, which means they are .072" in diameter unless somebody has messed with them..

 

[jeramie78]

Re: 1967 60hp rude problems

I blew in the holes (okie style) lol they seemed clear of any obstructions.

We took the boat out yesterday after making sure the dist. was at full advance and the butterflies were straight up and down at wot. The boat ran like a champ with one person in it but still only going about 26mph. This is a 14 foot glasspar G3 speed boat i think its a 67 also. Seats 2 at the most.
Once you get 2 people in it or try to pull a ski-bob with someone on it ...it starts to bog down again going only about 15mph. When you slowly push the throttle lever all the way down the dist. advances like it should and the butterflies open like they should. I guess the problem now is it isnt reaching full rpms. Please help this isnt my boat its my buddies if it was mine there would be a new merc on the back lol.

 

[coolguy147]

Re: 1967 60hp rude problems

thats it 26mph? should u be getting like 35mph with a 60hp

 

[F_R]

Re: 1967 60hp rude problems

thats it 26mph? should u be getting like 35mph with a 60hp

More than likely it is running on less than all 4 cylinders. Many possible causes. Start with a compression check. Then an ignition check. But the fact that somebody has been messing with the carburetor raises an alarm. If one of those jets we've been talking about is messed up, it will lack power on the two cylinders that it feeds.

 

[coolguy147]

Re: 1967 60hp rude problems

More than likely it is running on less than all 4 cylinders. Many possible causes. Start with a compression check. Then an ignition check. But the fact that somebody has been messing with the carburetor raises an alarm. If one of those jets we've been talking about is messed up, it will lack power on the two cylinders that it feeds.

do what this guys saids especially compression though most important and just incase ur impeller is a bit old replace it

 

[jeramie78]

Re: 1967 60hp rude problems

well that explains why the plugs on the passenger side of the motor are black and the ones on the driver side are a light brown color. hmmmm sounds more and more like spark or carb.

 

[a70eliminator]

Re: 1967 60hp rude problems

I'm not 100% sure, but under the distributor cap you'll find dual points, one for the left cylinder bank and one for the right, burn a set and you loose two cylinders. Did I say that right FR, lately I've been kinda shootin from the hip.

 

[jeramie78]

Re: 1967 60hp rude problems

yeah i noticed that too they wernt gapped right so i did that ...set them to
.020

We set it in a barrel of water and fired it up ...still ran rough. Pulled the plugs to see if they were wet and number 1 and 2 were wet with fuel. So i did the old spark plug test about a inch away from the block and they all sparked. So i dont know about that.

Now the bad part we pulled the plug from #3 and found water in the cylinder. Might be a head gasket or cracked head i think. I read on here it might be the exhaust gasket. Also there was alot of pitch black oil substance in the barrel after a few minutes of running it.

Leaves me to my next question where can i get gaskets for the heads and exhaust gaskets and is there any place to buy heads for these old motors incase of the real bad outcome of a cracked head?

 

[F_R]

Re: 1967 60hp rude problems

I'm not 100% sure, but under the distributor cap you'll find dual points, one for the left cylinder bank and one for the right, burn a set and you loose two cylinders. Did I say that right FR, lately I've been kinda shootin from the hip.

Well you are right about two sets of points, each firing two cylinders. But which ones? I have to study on that also. After studying, I conclude that each one fires one bank. Here's why: The firing order is 1-2-3-4, counting down from the top (cris-crossing). One set of points opens, firing #1. Other set opens, firing #2. First set opens again, firing #3. Second set opens again, firing #4. So, the first set opens to fire #1 and #3, same bank. Etc.

jeramie, no wonder it runs crummy. Water in the cylinders certainly will cause that. I can't tell you if it is the head or exhaust gaskets, either one will cause that. Your local Evinrude dealer is a good place to look for parts. Here at iboats might have the gaskets, but I haven't looked.

Don't be concerned about the oily crud in the bbl. That motor dumps a lot of excess fuel even when it is running right. When confined to a barrel, it looks very disturbing. And your non-firing cylinders are dumping even more than is normal. It is clear fuel when dumped, but turns black from the carbon particles in the exhaust pipe. Then it emulsifies with the water and what a mess!!

 

[jeramie78]

Re: 1967 60hp rude problems

well we pulled the top plate off the right head and it was saturated with water and tons of scale buildup and holes all through it. I dont know what that plate is called does anyone know? Its the one on top of the head. Then we pulled the head and found a big hole burned through it from the #3 cylinder that lead to the #1 cylinder. So hopefully that is the problem. I just need to know what that top plate is called so we can get the gaskets for it.

 

[Evinrude Boater]

Re: 1967 60hp rude problems

The gasket is the water jacket gasket. It should still be available from your local dealer. Sand and other deposits will accumulate in there. Your problem is with the hole burned through the head. Is it just the head gasket or in the aluminum head? Head gaskets are also still available but a little more money.

 

[jeramie78]

Re: 1967 60hp rude problems

Through the head gasket. My buddy ordered a new one through a parts supply store here that had a sierra parts catalog. He also found some heads in good shape on the internet for 12.99 each so he is buying those too and then having a pressure test done on them. <shrugs> he is like that ...guess he expects the current ones to kill over lol.

But thanks for everyones help it has been greatly appreciated.