6 HP Rude Fisherman Running Rough

[superflydudebike]

Re: 6 HP Rude Fisherman Running Rough

12 foot Mirrocraft aluminum. Only person in boat was myself and I'm not a heavy guy. I have another 6 HP Evinrude motor and while it is no speed demon, that motor moves this boat along nicely.

 

[asdasc]

Re: 6 HP Rude Fisherman Running Rough

OK, just checking. I have an 18hp on a really heavy old pontoon boat, and it doesn't rev like it should. I am 100% convinced that I need a different prop for it. Until I pony up the cash for a new one, I just take it real easy on the throttle.

 

[Tim Frank]

Re: 6 HP Rude Fisherman Running Rough

Thanks for the all the helpful comments and even the mild attempt at humor. No one knows who Shecky Greene is out there?

I think you may simply have confused us....using the words "funny" and "Shecky Greene" in the same sentence is almost an oxymoron like "jumbo shrimp" or "Government service"

I have not tried anything yet. I think it is fuel related. It feels like it wants to take off, but I get an intermittent spit back when throttle is opened up. Also, playing with the rich/lean knob seems to have no effect. I should have not have bought this turkey w/o seeing it run first. I vow never to do that again. I'll keep you folks posted as I delve into it further. Gas is from beginning of season. I paid $250 for it. I'll hook up a different gas tank to see if it performs better and go from there. Filter screen is likely fouled up as well. Thanks.

If it was me, I would get a sample of the gas, from your current tank, that has been going into the motor just to assess what it is like. Collect it in a clear glass jar and just have a look. If it looks like the Mississippi River after a flood, you are heading in the right direction; and in my experience once one of those metal tanks starts to rust, you are fighting a losing battle. You should be able to pick up a decent used plastic one for not many $$$.

 

[superflydudebike]

Re: 6 HP Rude Fisherman Running Rough

I see someone has done their homework and Googled Shecky. Acts like that belong in the Catskills, deep in the Catskills.

 

[superflydudebike]

Re: 6 HP Rude Fisherman Running Rough

I finally pulled the hood off and looked at the carb. It seems like it may be leaking a bit of gas from new carb gaskets, how tight should these be torqued down? I do not have a torque wrench, but in general, should they be pretty firmly cranked down or will excessive force cause the bolt heads to break off? There is only one needle valve adjustment to be made on this motor, correct?

 

[asdasc]

Re: 6 HP Rude Fisherman Running Rough

Is it leaking between the carb body halves, where the carb meets the powerhead, or out the needle valves?

If it is the carb body halves, you can torque them hand tight with a screwdriver, but otherwise they are warped and damaged. You can take a sheet of emery cloth on a peice of glass and sand them both flat and try again.

If it is the needle valves, be sure you got ALL of the old gaskets out and cleaned it in there really well. Then you put TWO of the small round gaskets in and tighten the outer part until the needle valve turns stiffly by hand in the packing. You want it tight enough that it won't vibrate and move, but loose enough to where you can still adjust the carb by hand.

 

[steelespike]

Re: 6 HP Rude Fisherman Running Rough

If they are tight not forced they should not leak.I think if you check you'll find the gas is coming from elsewhere not actually the gaskets..Motor has a low speed mixture adjustment and a fixed high speed jet.Again watch the stator (plate under the flywheel)as you advance the throttle.It should rotate.If it doesn't it would cause the Dug dug dug affect.if gas is leaking out of the carb the float may out of adjustment or stuck.Disconnect the fuel line as you run at speed as the gas runs out it should momentarily pick up speed.could be an indication of too much fuel.9stuck or out of adjustment float)

 

[superflydudebike]

Re: 6 HP Rude Fisherman Running Rough

Appears to be leaking at carb body halves but it could just be gas that came out where choke plate is located. Yes, stator is rotating. This is the curved piece that as handle is turned, increases acceleration by feeding more gas into carb, correct? It appears to be operating as designed. I'll start with gas supply, filter screen, and slow speed adjustment and then proceed from there. May need a redo of carb rebuild. If I take carb apart to check float and general condition (varnish), can I reuse gaskets from Spring if they are not damaged?

 

[Tim Frank]

Re: 6 HP Rude Fisherman Running Rough

If I take carb apart to check float and general condition (varnish), can I reuse gaskets from Spring if they are not damaged?

Probably, but the gaskets are cheap compared to the hassle of taking the carb off...and apart to put in a new gasket if it turns out the old gasket was actually not fit to reuse.

 

[jay_merrill]

Re: 6 HP Rude Fisherman Running Rough

My suggestion is to buy an OEM service manual for your motor. They are available right here at iboats. Once you get it, read through the trouble shooting section to see what conditions might fit your symptoms.

I also suggest a compression check of both cylinders. Doing so will give you some sense of whether or not you have purchsed a "turkey." You will probably get readings in about the 80 pound range, if the powerhead is healthy. As long as those values aren't extremely low (under 60), and are within about 10% of one another, you probably have a relatively decent powerhead. If there are no obvious signs of major mechanical problems, especially the gearcase, you've probably got a nice little motor.

The good news is that the 6hp OMC motors of that era are extremely simple. They will run or not run based upon three very basic things - fuel, ignition and cooling. With the factory manual, you can check all three things easily, and should soon find your problem. Going through the process will also provide the benefit of teaching you a great deal about your motor.

BTW, your motor has a fixed high speed jet in the carb. Since you have been fooling with the low speed needle valve without knowing exactly how it was set to begin with, I recommend a complete readjustment. Screw the valve in until it seats gently. Do not overtighten the valve because you will indent its beveled edges if you do. Then turn it back out 1 and 1/2 turns. That is your base point for adjustment. Next, put the boat in the water, secure it to the dock firmly, start the motor and place the motor in forward gear. Set the throttle to the "slow" position, which should yield about 700 - 750 rpm. Now adjust the needle valve until the motor runs the fastest and smoothest. Once you do this, reset the plastic knob on the needle valve to the midpoint of the adjustment range, indicating the "normal" position.

If this doesn't fix your problem, its time to run through the troubleshooting items in the OEM manual. I'm sure everyone here will be more than willing to run through those steps, as you do them.

 

[superflydudebike]

Re: 6 HP Rude Fisherman Running Rough

could be bad carb rebuild, but more likely one of the coils is bad. With it running pull one plug wire and see if it makes any difference. If it's running on one you can pull one and it will still run. Put it back on and pull the other one and it will die.

This seems to be the problem. I checked gas. Not contaminated. Fuel filter clean. Reset slow speed adjusment. Cleaned and regapped plugs. Then, I tried above and engine shut off when uppper plug boot pulled off. Were do I get a coil for this? Should I replace both or just the one not working? 1971 Evinude Fisherman. model 6102. Thanks.

 

[freddyray21]

Re: 6 HP Rude Fisherman Running Rough

coils are available just about everywhere including here at iboats.

http://www.iboats.com/mall/partfind...gd_poid=355991&gd_row=32&**********=847784016

replace both while you are in there. also inspect the points and clean and re gap them.

 

[superflydudebike]

Re: 6 HP Rude Fisherman Running Rough

Need to remove flywheel to address ignition coil replacement. I realize that this should be done with a puller (per Seloc manual), but is it feasible to do it without one. If so, how? If I need a puller, where would I order one? Would one for a 1971 6 HP Rude also fit a 1986 15 HP Rude (my other motor)? Go with Sierra coils? Someone is selling non-Sierra coils via e-bay store for cheap. Stay away from them?

 

[freddyray21]

Re: 6 HP Rude Fisherman Running Rough

I use a harmonic balancer puller works just fine and it will work on both your motors as well as a host of others. don't use a jaw puller.

 

[superflydudebike]

Re: 6 HP Rude Fisherman Running Rough

Will I have access to the ignition coils by removing the flywheel or will I need to remove addtional items? I remember reading about something else that needed to be removed and the Seloc manual advised having a special tool for that as well or damage to seals could occur. Or does this extra step just apply to larger engines? I see I can get a harmonic puller from Harbor Freight for ten bucks. Craftsman has one for twenty. Is this a tool where I don't want a really cheap one?

 

[steelespike]

Re: 6 HP Rude Fisherman Running Rough

I don't think there is anything else to remove before the flywheel.
I have the Harbor freight puller and it has worked fine on my small engines.
You probably should get what they call 5 line bolts(actually have 3 lines on the head). to use with the puller.Leave fly wheel nut on loose to protect threads.Tighten puller and wack the center bolt to pop fw loose.
retighten and whack as necessary.

 

[superflydudebike]

Re: 6 HP Rude Fisherman Running Rough

No, I was referriing to removing something affter the flywheel was removed. The Seloc manual, section 5-5, made it sound like you could access the points and condensor after flywheel was removed, but not the coils. I thought you were not supposed to whack the center bolt as it could cause damage? Would a rubber mallet be sufficient?