'63 40HP Evinrude top cylinder no fuel UPDATE

[daveswaves]

Re: '63 40HP Evinrude top cylinder no fuel UPDATE

Good to see you got it going Grain, enjoy before the water gets to hard to boat on there in Mn.

 

[Grain Boat]

Re: '63 40HP Evinrude top cylinder no fuel UPDATE

Well, I couldn't take it any longer and set out for a local lake to run the old 'rude through its paces. Turned out to be a beautiful day with a nice temp of 85 and mostly sun. There was a stiff breeze from the south but it was most welcome. All this in spite of the grim forecast. Go figure. I was solo and managed to land the boat without incident. There were maybe 5 trailers parked at the ramp. Motor started right up but surged a few times then quit. Went through this process about 5 times until it ran long enough that I cast off from the dock. Throttled it up a bit and it felt good for an instant and then died. I anchored, took the hood off and squeezed the bulb. Never really got firm but after a few tries it restarted. There was a lot of fuel spilling from the mouth of the carb and from the overflow port above the mouth. Normally I fix things by hitting them so I gave the carb bowl a firm whack with my vise-grips. The motor eventually restarted and I got moving but every time I gave it throttle it died again. I was almost resigned to taking it home and figuring on rebuilding the carb but once I got going again things suddenly smoothed right out. Could've been the Sea Foam or the decarb but for the next 2 1/2 hours the motor ran beautifully! I was in heaven! Somewhere between 1/2 and 3/4 throttle it planed out without hesitation. At full throttle it was a speeding aluminum bullet carving gracefully through the choppy water. I probably circled that lake 20 times. There was not so much as a hiccup until the 6 gallons I started with began to run out. All in all it was a successful test ride but I'm still left with a few questions. Should I even touch the carb knowing that it is functioning properly now? Also, I started with fresh plugs but the bottom one is considerably darker than the top even though they are both firing properly. Any reason for concern there? I was running a 40:1 mix. Thanks for all your help guys....

 

[lark2004]

Re: '63 40HP Evinrude top cylinder no fuel UPDATE

good info in here, good work guys. Thanks for the info on the coils Paul, that will help when I get to doing mine.

 

[Mark42]

Re: '63 40HP Evinrude top cylinder no fuel UPDATE

Grain Boat,<br /><br />That is one cool aluminum boat. Bet it really flies with 40 hp! <br /><br />Don't you think its time for a new steering cable?<br /><br />Glad to see it's running. I would put some carb cleaner in the fuel for the next 6-12 gallons or so. Just make sure the cleaner is compatable with your carbs (plastic, etc). <br /><br />My Evinrude 40 is a bit newer than yours, but it likes a nice warm up, about 3-5 minutes before it will shift into gear without stalling. If it doesn't warm up, it doesn't want to go. So I start it as soon as it's off the trailer and it idles on high until everyone has their life vests on, boarded and all the coolers, cameras, towesl, chairs, etc are loaded. By then the motor is warm and ready to go.<br /><br />Mark.

 

[Namcali]

Re: '63 40HP Evinrude top cylinder no fuel UPDATE

Grain Boat,<br /><br />Good work here that you have. Keep it up.<br /><br />Paul, thanks for the coil info. I am not sure when I will need mine but it's a good piece of info to have.<br /><br />I am planning to get out this weekend for the last trip before I start restoring the boat then play with the idling problem.<br /><br />Thanks,<br /><br />Nam

 

[Paul Moir]

Re: '63 40HP Evinrude top cylinder no fuel UPDATE

Grain Boat - That plug difference may be due to a leaking fuel pump diaphram. If I'm not mistaken, your '63 should have an old style fuel pump that is fed by pressure pulsed from the lower crankcase chamber via the lower intake bypass cover. So if it was leaking it would feed fuel into the lower cylinder.<br />It's easy enough to check - just disconnect the 'pressure' line from the fuel pump and give the primer a couple squeezes. If fuel is coming out of the hole, the diaphram is ruptured. That's not a big deal since that fuel pump is rebuildable. Try to get the OEM kit since it'll update the plastic plunger that acts on the diaphram if yours is still the old style small one.<br />With the carburetor - undoubtedly yours still has a cork float, which is intolerant of alcohol based fuels. So rebuilding the carb even if it's now perfectly clean inside isn't a terrible idea. This is not something that's important to adress immediately, but rather some preventive maintanance you should consider doing sometime. You need to get the dealer kit for this - the aftermarket (18- numbered) kit does not contain the float.<br />I'm glad to here it's running strong now though.

 

[Grain Boat]

Re: '63 40HP Evinrude top cylinder no fuel UPDATE

Originally posted by Mark42:<br /> Grain Boat, <br /><br /> That is one cool aluminum boat. Bet it really flies with 40 hp!<br /> <br /> Thanks Mark. Any more HP and I'd have to attach some wings. <br /><br /> Don't you think its time for a new steering cable? <br /><br />Good eye. I'm very concerned about the steering but I've yet to research it thoroughly. Maybe the subject of another thread in the future if I can't find the info.<br /><br />

 

[Grain Boat]

Re: '63 40HP Evinrude top cylinder no fuel UPDATE

Originally posted by Paul Moir:<br /> Grain Boat - That plug difference may be due to a leaking fuel pump diaphram.<br /><br />I'll check that out Paul. Sounds like a likely scenario.<br /><br /> With the carburetor - undoubtedly yours still has a cork float, which is intolerant of alcohol based fuels. So rebuilding the carb even if it's now perfectly clean inside isn't a terrible idea. <br /><br />I'll be looking into that as well Paul. Given that everything else on this motor was original, it probably does have the cork float. I just don't relish the thought of pulling the starter and generator assemblies just to remove the carb. That's damn near a 6-pack job. <br /><br /> I'm glad to here it's running strong now though. <br /><br />Thanks in no small part to your help, along with daveswaves and others. I belong to several other forums and I'm still amazed by the wealth of information here and the great conduct of the members. Hope I can contribute in some small way. See you on the lake (or river)!

 

[lark2004]

Re: '63 40HP Evinrude top cylinder no fuel UPDATE

Thanks in no small part to your help, along with daveswaves and others. I belong to several other forums and I'm still amazed by the wealth of information here and the great conduct of the members. Hope I can contribute in some small way.

I gotta agree, This is one of the Most helpfull forums I've found. Even when compared to some other topics on Iboats (e.g:mercury/mariner ) the Johnson/Evinrude forum always seems to deliver a prompt answer.

 

[TheInterceptor]

Re: '63 40HP Evinrude top cylinder no fuel UPDATE

Grain Boat<br /><br />I just purchased a factory rebuild kit for my carb on my '61 'rude 40hp (from Bombardier) and it contained the following:<br /><br />cork float, needle and seat, all gaskets, packing, etc. <br /><br />Pretty simple job really just keep track of all the parts as they come off. Make sure to blow through all passages thoroughly.<br /><br />By the way, if anyone needs any info on 56-70 2 cylinder 'Rudes and Johnsons I have both Clymer and Seloc manuals.<br /><br />Jack<br /><br />-1964 Thompson Sea Mate wooden Lapstrake w 1961 Evinrude Lark III 40HP

 

[STAGE3]

Re: '63 40HP Evinrude top cylinder no fuel UPDATE

Hey Interceptor<br /><br />I need a part number for my Lark III<br /><br /> I need the part for the piece that attaches to the top of the pull start,and leads down into the carb! Need a new one!<br /><br />Can you help!?<br /><br />STAGE 3

 

[Paul Moir]

Re: '63 40HP Evinrude top cylinder no fuel UPDATE

Stage3 - Just to make sure, you're aware that's just the pull start interrupter that locks out the pull start if you have the throttle set too high?