1963 'rude 40hp Overheating? (Update 10-30-04) Grainboat, take a look

[TX Duck Guy]

Doing some maintenance on my "new" 1963 (model 40373) Lark and have a couple of questions:<br /><br />1) low idle mixture screw is kinda beat up and missing the knob to turn it, where can I get a good serviceable set?<br /><br />2)Hose connections: OK, I know I'm in line for a beating, but I didn't label my hoses before I removed them......<br />SO, I have several areas I'm concerned with:<br /> A-hot water choke<br /> B-vacuum line on choke<br /> C-carb<br /> D-vacuum cutout switch<br /> E-fuel pump pressure line (to make it pump)<br /><br />My manual (Sealoc) does not go into great detail about hose connections and I can't find a diagram.<br /><br />It would make sense to me that the hose barbs on the intake manifold might be vacuum.<br />I think the one on the intake cover is pressure.<br />I can see where the water lines hook to on the powerhead and middle unit, but am unsure as to which is supply and return for the choke.<br /><br />As to the rest, I'm just not sure!<br /><br /><br />Thanks in advance for your help!

 

[Grain Boat]

Re: 1963 'rude 40hp Overheating? (Update 10-30-04) Grainboat, take a look

Does yours look like this or this ? If so, give me a little time and I'll check my lines and hoses and give you a shout back.

 

[Paul Moir]

Re: 1963 'rude 40hp Overheating? (Update 10-30-04) Grainboat, take a look

The 'PRESSURE' line on the old style fuel pump you have connects to the 90° port on one of the bypass covers on the right (port) side of the engine. The vaccum cutout switch connects to the manifold.<br /><br />Grain Boat should be able to help you out with the choke water line routing.

 

[Grain Boat]

Re: 1963 'rude 40hp Overheating? (Update 10-30-04) Grainboat, take a look

OK here goes. BTW I found a clamp I forgot to tighten in doing this so a little help goes a long way. <br /> <br /> Water Choke Line Routing<br /><br />Choke Vacuum Line: Out bottom up along starter inward then clamps to face of bracket (on starboard fore side) that holds the generator and starter bracket assemblies together (says "caution" on it). From there it turns abruptly downward behind choke and into large nipple of intake cover just beneath the starboard carb mounting bolt.<br /><br />Bottom Water Line: Goes under carb and generator to clamp (mounted on bottom stud of generator mounting bracket) to elbow on block just above rear of port side motor mount.<br /><br />Top Water Line: Goes over carb and clamped to port side of same bracket mentioned previously. Clamped twice more going aft to port side lugs at top of recoil assembly (over the top) and into elbow (port side) aft of top cylinder head.

 

[TX Duck Guy]

Re: 1963 'rude 40hp Overheating? (Update 10-30-04) Grainboat, take a look

COOL!<br />Thanks a lot ya'll!<br />Grain Boat: Yes my motor looks like that (BTW mine doesn't have a recoil start, I wonder if that was an option mine didn't have)<br /><br />Paul Moir:That helps quite a bit!<br /><br />Let me make sure I've got this right...<br /><br />1-On the intake manifold (where the carb<br /> attaches) there are two fittings.<br /> The small one is vac cutout<br /> The larger one goes to the choke<br /><br />2-Engine: two connections (both on intake side)<br /> One on block just inboard of the head goes to<br /> the top water line on choke<br /> One on intake bypass cover goes to fuel pump<br /> pressure fitting<br /><br />3-On case just below powerhead<br /> To bottom line on choke (exhaust side of motor)<br /><br />It's easy to see mine right now with my powerhead on my work bench. I also printed this out and drew my own diagram this time.<br /><br />Thanks again!

 

[TX Duck Guy]

Re: 1963 'rude 40hp Overheating? (Update 10-30-04) Grainboat, take a look

Does anyone know where to find the low speed mixture screw?

 

[Paul Moir]

Re: 1963 'rude 40hp Overheating? (Update 10-30-04) Grainboat, take a look

That sounds all correct to me, but the water choke line routing is coming from the dimmest, darkest regions of my memory. <br />Make sure the recirculation line is still in place. It comes out of a small nipple at the bottom front of the engine up to the exhaust side top. It feeds oil from the bottom crank bearing to the top crank bearing.<br /><br />EDIT: In the front top of the carb. Just above the intake.

 

[TX Duck Guy]

Re: 1963 'rude 40hp Overheating? (Update 10-30-04) Grainboat, take a look

Yup, I just looked at it and it's still there.<br /><br />Just read some of your posts on Grain Boat's thread about his motor, I think you're right this motor does look a little "Star Trekish"

 

[Grain Boat]

Re: 1963 'rude 40hp Overheating? (Update 10-30-04) Grainboat, take a look

My recirculation line is flexible but very small diameter-wise and has factory crimped fittings on each end. I think it was meant to not be removed. Mine is still painted like the engine. Sorry to hear you don't have a recoil TX. Do you have a generator and/or electric shift? Does this motor run? Good compression? Curious minds want to know...

 

[TX Duck Guy]

Re: 1963 'rude 40hp Overheating? (Update 10-30-04) Grainboat, take a look

I do have electric shift, but no generator. I asked a while back in these forums and it turns out that the generator was an option. Looks like mine never had it. I got this boat (1952 Lonestar 14ft aluminum), motor and trailer as a hand me down from a friend. I've never heard it run. When my friend first got it, I helped him troubleshoot it because we had no fire. Then, it was given to me and I decided to go through the motor and replace anything I thought might be a future problem. So far I've done everything except split the engine case or open the gearbox. I put my compression tester on it and got 100psi for each cylinder. <br /><br />I pick up my gaskets this weekend and should have it ready to fire by Sunday (if I can find some darned spark plug wire!!!)<br /><br />I'll update when I get some more done!

 

[Grain Boat]

Re: 1963 'rude 40hp Overheating? (Update 10-30-04) Grainboat, take a look

Hey TX,<br /> Once you get that motor tuned up and have a good charged battery you won't have to worry about a recoil or a generator. I finally got mine running good today after hours of tweaking and it pushes my 14' Aluminum Lone Star (60's Malibu) around like a toothpick. Mine still has only 80 lbs. compression on each cylinder but that is plenty good. If you run in to any more trouble putting it back together, give a shout. Later...

 

[TX Duck Guy]

Re: 1963 'rude 40hp Overheating? (Update 10-30-04) Grainboat, take a look

Things are getting closer. It seems that my original estimate was off by a few weeks. Dove season has been keeping me busy and outdoors more than I thought it would. Anyhow, I have the motor mostly re-assembled. I just completed installing all new ignition components including new plug wires. Next on the agenda is to re-wire the thing (motor and boat sides). I hope it goes smoothly. THANKS FOR ALL THE HELP SO FAR!!!

 

[TX Duck Guy]

Re: 1963 'rude 40hp Overheating? (Update 10-30-04) Grainboat, take a look

I got it all ready....IT ACTUALLY RUNS!!!<br /><br />Took it out to the lake today and did some running around. Ran pretty well. Afterwards my overheat alarm came on. I have a brand new impeller in it. I had the lower unit off last night and the water pump looked OK. The wear plate was polished a bit, but didn't look too bad. <br /><br />I kept checking the back of the motor for a "pee trail" but never got one. It spit some water out, but no stream. Is this normal?<br /><br />Motor didn't seem too hot when we pulled it out and pulled the cowl. <br /><br />Lastly, if this pump is jacked up, where the heck do I find a new water pump and wear plate for a motor this old?<br /><br />On week til duck season and I'm dying to get it done!!

 

[jimmbo]

Re: 1963 'rude 40hp Overheating? (Update 10-30-04) Grainboat, take a look

Generators were optional on the Electric Start models but were standard on the Electric Shift models.

 

[Jcrain]

Re: 1963 'rude 40hp Overheating? (Update 10-30-04) Grainboat, take a look

Which lake do you hang out at?

 

[TX Duck Guy]

Re: 1963 'rude 40hp Overheating? (Update 10-30-04) Grainboat, take a look

My blind is on Lake Wichita, but I'm learning more about the area lakes every day. I've been in the area about a year and still have a lot of exploring to do. Spent a lot of time this year at Buffalo hunting dove but didn't have much luck with that.

 

[Jcrain]

Re: 1963 'rude 40hp Overheating? (Update 10-30-04) Grainboat, take a look

Kickapoo is a nice lake, just sort of low on the water right now. It's quiet and not too crowded