1969 Evinrude Fastwin 18HP troubles

[AlTn]

Re: 1969 Evinrude Fastwin 18HP troubles

the retaining ring and armature support plate require a light amount of grease

 

[870 Expressmag]

Re: 1969 Evinrude Fastwin 18HP troubles

ok, well i will clean everything up and grease the plates lightly and after i get the rest done i will put together and run it for a while and re-check

 

[870 Expressmag]

Re: 1969 Evinrude Fastwin 18HP troubles

i got the NOS head i bought but now just waiting on gaskets and stuff, should be here tomorrow, anyone know the head bolt torque?

 

[AlTn]

Re: 1969 Evinrude Fastwin 18HP troubles

96 - 120 INCH pounds

 

[870 Expressmag]

Re: 1969 Evinrude Fastwin 18HP troubles

thanks, actually got the gaskets today, will be working on it tonight, hopefully on the water this weekend!

 

[kfa4303]

Re: 1969 Evinrude Fastwin 18HP troubles

Make sure you torque down the head bolts in the correct pattern too. If you need it we can post if for you. Good luck!

 

[870 Expressmag]

Re: 1969 Evinrude Fastwin 18HP troubles

Yep, the pattern would be helpful if not to much trouble, thx

 

[870 Expressmag]

Re: 1969 Evinrude Fastwin 18HP troubles

well, the problems continue...i got the NOS head on, new head gasket, new thermostat and seal (old one was orig), and new thermostat gasket. New points and condensors, gapped at .020. Coils look great. have HOT blue spark. New plugs J6C gapped at .030. Put it all together, put in trash can of water, pumped up primer bulb and dad tells me theres now gas shooting out between fuel pump cover plate/screen and the gasket and pump body. I believe this is the first time this has happened since the last time i had it at the lake i got the primer bulb to firm up, this time it wouldn;t firm up. We tried to fire it anyway, got it started, idle for a second, put it in gear, revved up a little, then eventually died. Couldn;t re-start. I suspect maybe i had a bunch of little problems going on before? Helicoiled plug hole leaking a little (now fixed with new head), wrong plugs, one set of points was burnt (now fixed with new ones), and fuel pump leaking? Like i said i dont think this happened before but i do remember last time or two at lake i could hear it in the motor pumping as i squeezed primer, but thought it was just normal to hear it pumping up, didnt take cover off before so didnt notice the spray but the bulb got firm...now the bulb doesn;t get firm. Is there a rebuilt kit for this fuel pump or am i stuck buying a new one? this is getting frustrating

 

[kfa4303]

Re: 1969 Evinrude Fastwin 18HP troubles

Hi 870. Sounds like you're kinda sorta getting there. Let's take a step back and check the basics again. I'd first confirm good compression considering you have a new head and head gasket. Anything over 80-90psi is good. Assuming the compression is ok, let's check the spark. Sounds like it's nice and strong after the ignition work you've done, but make it can jump a 1/4" gap with ease. Once that is ok, all that remains is fuel. If the carb hasn't been cleaned and rebuilt recently that would be a good idea. You can get a rebuild kit here at iboats for about $20. If the carb is ok, then check the fuel pump. To test it, squeeze the primer bulb with the engine off. If the bulb firms up and stays that way, the pump is probably ok. Make sure the bulb itself is also in good condition. Now try starting the motor, if it starts to die, manually squeeze the primer bulb and wait for a response. If the motor picks up, then the pump is probably bad. Unfortunately, I don't think you can rebuild that particular model :/ If that is the case, check ebay, aomic.org, or here in the forums for a replacement. Good luck.

http://www.marineengine.com/parts/johnson-evinrude-parts.php?year=1969&hp=18&model=18902D

 

[870 Expressmag]

Re: 1969 Evinrude Fastwin 18HP troubles

well i got a fuel pump on order, those little babies are expensive! I am wondering if maybe this hasn't been my problem all along. In our business we are seeing the effects of the fuel we have now. And after we cleaned the carb the first time and had it running good, it took off first pull at the lake when we had no batt for elec start, and then things slowly and progressively went downhill so i am wondering if that old fuel pump went bad from setting and just took a few runs with fuel through it for it to rear it's ugly head. well i hope this fixes it, if not, back to the drawing board.

 

[870 Expressmag]

Re: 1969 Evinrude Fastwin 18HP troubles

oh another question i had, on the main shaft above the prop but below the horizontal fin (please forgive my terminology), there are two tiny holes, when we took it out of trash can last night after attemtping to run it, water ran out of them, what are those holes for?

 

[AlTn]

Re: 1969 Evinrude Fastwin 18HP troubles

just drains to prevent freeze damage to the casting

 

[870 Expressmag]

Re: 1969 Evinrude Fastwin 18HP troubles

ok, really frustrated now. I now have installed all of this new: Head, head gasket, thermostat, thermostat seal and gasket, points, condensors, plugs, fuel pump, and fuel lines. I have cleaned the carb. I have 110psi on both cylinders after new head and gasket. I have hot blue spark on .020gapped points and .030gapped J6C plugs. I have good fuel flow through new lines. ok now heres what it's doing. The other night when the fuel started squirting from between the fuel pump halves, we couldn;t get it to start, and plugs were dry, now with new pump and lines it starts and runs, but still cant get it to idle. I took the adjustment linkage off again and ran jet all the way in till lightly seated and backed out 1 and a half turns, i get a lean spit so i richen a little, still lean spit, it will run at fast idle in "start" position but it spits, it will spit all the way out to 2 or 2 1/4 turns. If i try to idle down to shift position it will run rough and die. I did get it to run half way decent once on the "idle" setting of tiller, and it ran then slowly trailed off and died, no lean spit. I am pulling my hair out, it's driving me nuts. Dad works on all the 2 strokers at work, i work on 4 strokes so this is a little foreign for me. He says it sounds like when he has chainsaws that have an airleak on a crank seal, i was afraid of that. I'm getting more and more frustrated as my free weekends keep slipping by with no boat motor!

 

[870 Expressmag]

Re: 1969 Evinrude Fastwin 18HP troubles

is the upper crank seal my next logical step? does this sound like a leaky seal making it run lean, and not idling good? i was smart enough when i ordered my other parts to also get an upper crank seal and carb kit, just in case.

 

[AlTn]

Re: 1969 Evinrude Fastwin 18HP troubles

personally, I'd at least do the following...< marineengine.com..carb diagram > remove and clean #35 <orfice plug/main jet >..remove #5 core plug, either drill a hole in the center and pop it out, or use an awl to pierce the center and pop it out, it's only an aluminum disc ~1/8" thick, clean thoroughly the 3 or 4 holes at the bottom of that well, you'll see they enter the carb throat behind the throttle plate. Now look into that opening and you'll see the tip of the mixture needle, it is positioned and sealed by the needle bearing< should be in your kit and I'd replace it >. Remove the needle and retainer. Look at the underside of the carb body where the bowl screws on. Note the hole that is not threaded as this is the passageway up to mixture needle. Clean this passage thoroughly. Reassemble the carb with a new bearing and retainer. Replace the core plug < convex side up, it seals by expanding it when it's struck in the center..I use a 3/8" extension, but whatever does the job >. Carb back on, you should be able to get an idle with a combination of the mixture screw and the idle stop screw on the port side below the vertical shaft. If still no go, post back results. Your carb kit should contain all the parts mentioned requiring replacement.

 

[870 Expressmag]

Re: 1969 Evinrude Fastwin 18HP troubles

AITn, i did exactly as you stated, i didn;t think the carb was dirty, since it looked so good the last time i had it off but i figured what the heck, took it off again and completely rebuilt it this time, she is clean as a whistle! and put new carb kit in. Dad got the upper crank seal out (thats a pain in the *****) and replaced that, we re-assembled everything and pulled boat back out of shop into the yard, filled trash can full of water, it starts up but wont idle, it misses, spits, etc. we tried adjusting it, doesnt seem to do much good, we can get it to run about 1/4 to mid throttle with prop in gear and it will hold steady for a while and seems like it's running ok, then back off throttle a little like your stopping or bringing it down to shift and it starts spitting, or will just plain die. I've had it, almost 200 in new parts and all this lost time on the water, when do you just cut your losses and call it quits? problem is the motor seems to be in great shape, just dont run for ****

 

[classicevinrude]

Re: 1969 Evinrude Fastwin 18HP troubles

870,
I have a 1967 20hp that I have done the exact same things to as you did to yours. It is still running exactly the same. I will be watching this thread very closely. It is coming apart again tomorrow to triple check everything. If I find something new, I will post back. Best of luck.

 

[870 Expressmag]

Re: 1969 Evinrude Fastwin 18HP troubles

the only other thing dad and i can think of, since we did everything else, is maybe the timing and spark advance is not set right, but we have no idea how to adjust that stuff, possibility?

 

[AlTn]

Re: 1969 Evinrude Fastwin 18HP troubles

find the 2 marks on the timing cam, advance the throttle until the carb roller is between these marks -the throttle plate should be closed and all slop adjusted out of the linkage either by moving the timing cam in or out, or holding the roller against the timing cam and adjusting the linkage at the throttle shaft- now, as the center of the roller passes the second mark the throttle plate should begin to open. Shift the engine into forward and advance the throttle to wot. The throttle plate should be on the highest part of the timing cam and the throttle plate perfectly horizontal in the carb throat. Idle is set with the engine hot, in gear and pushing the boat.

F_R recently wrote up a procedure for improving the idle on this series of 2 cylinder engines. Find this write up as it goes into the details of the why's and how's. I plan on trying this with a 1971 25 hp I currently am reassembling. I'm going to pull the fuel line that runs from the base of the crankcase to the small nipple on the transfer plate above the fuel pump. Next, plug that small nipple and connect that end of the fuel line to an el fitting I'll attach through the pan. In F_R's write up you'll see that that fuel line is a means to bleed off excess fuel that collects in the bottom of the crankcase. Where this excess fuel ends up affects the the ability to achieve a smoother idle.

DO NOT,by mistake, disconnect the fuel line that runs up to the top bearing.

 

[870 Expressmag]

Re: 1969 Evinrude Fastwin 18HP troubles

the two marks your reffering to are those two verticle marks that look like number ones correct? heres a photo of what it looks like when the tiller twist grip is down on Idle near Stop.


here is a picture of what it looks like when twist grip is at "start" position


does this look right so far? i havn't checked the throttle plate yet, just making sure im in the right ballpark and seeing if anything looks out of whack yet.

also another question, the stop portion on the twist grip, does this mean if you twist it back it will kill the motor? or just mean stop forward motion? and is it set up to ground out ignition or just shut fuel down so far it dies?