53 Fastwin problems. . . AGAIN! :(

Kelpy

Seaman Apprentice
Joined
Oct 22, 2011
Messages
32
So I'm really starting to think that my buddies are right, I need to throw this piece of $%#@ in the lake and get a real motor. Unfortunately I'm in college and a 3K dollar motor is not in the budget.

So here goes again. Got this motor about 8 months ago and it was in rough shape. Fixed the condensers, points, and all the other ignition parts, spark plugs and wires included. Then went through the carb with a kit and cleaned that all out. Had some problems with the motor only running well with the choke out. Changed the fuel lines and bam, it worked great for about a month. I have been out about 5 or 6 times since then. I am working out of town for the summer so the motor sat for about 7-8 weeks and I pulled it out yesterday and went to the river. It was hesitant to start. It would turn over and then go about 5 revolutions and then die. I would pull on the chord with the motor on stop (to prevent it from flooding) then put the choke on and turn it to start, again it would do the same thing. It went after about the 10th time of this. Ran fine all day. Started and stoped several times to fish. All day long it was a one pull motor. I thought that maybe it was just degrading fuel in the lines and once that cleared it was good to go.

Today went to the lake. 3 pulls and it fired right up. Put it in reverse, swung the boat around and into fwd. We were off for a full day of fishing. Headed out of the no wake zone the motor kind of hesitated right at the no wake bouys. I hammered down on the throttle and off she went. We cruised for about 3/4 mile and it started to slow down (boat speed, but the motor sounded great). It slowed all the way down until it was only barely dragging a wake with the throttle as far as it would go. Then it slowly died. That was it. Limped back into the ramp with the trolling motor.

Thought maybe it was the carb that was maybe gummed up with 2 month old fuel. Pulled it all apart on the tailgate of my truck. Cleaned out everything and it looked good. Blew out the holes with a can of starting fluid (only thing I had with some sort of air force). The only thing I didn't pull was the welch plug. Squirted fluid down the low speed needle hole and it appeared to be moving fluid into the carb body. Checked the float and needle and those appeared fine, the carb was full of fuel when I took it off too.

Pulled the spark plugs and they were sparking, very wet, but sparking. I dont think the needles moved because the packings are pretty new and I have to use pliers to adjust the needles.

Pulled on the chord for about an hour until I was dripping sweat. The only time I could get it to fire was when the throttle was on full and the motor in reverse. It would fire for about 2-5 revolutions and then die. I couldn't get it to fire in the neutral position on choke or without it. . .

What the heck is going on with this stupid thing? I'm getting REALLY tired of burning $50 in gas to get there, then paying a $10 launch fee and finding out afterward that my dang motor is going to crap out on me! Ready to throw it in the lake. Absoloutely pissed today headed home.
 

Kelpy

Seaman Apprentice
Joined
Oct 22, 2011
Messages
32
Re: 53 Fastwin problems. . . AGAIN! :(

Forgot to mention, the motor would backfire or make a spit sound into the water when I was pulling the chord sometimes. . . I dont know what thats all about or if it help the diagnosis of my problem?
 

HighTrim

Supreme Mariner
Joined
Jun 21, 2007
Messages
10,486
Re: 53 Fastwin problems. . . AGAIN! :(

Are the coils original or were they replaced when you overhauled the ignition? When reinstalling the flywheel, did you properly torque the flywheel nut? If so, to what? If you did not properly torque the flywheel, you may have sheared the key.

After that, what is the compression on the motor? Should be the first thing you check in a no start scenario. Also, get an inline spark tester and set it to 3/8" gap. Having the actual plugs spark against the block tells you squat. You need a larger gap than 030.

If compression and spark check out, and the key is not sheared, spray some premixed fuel into the cylinder and try to fire it, does it now run for a couple seconds?
 

Kelpy

Seaman Apprentice
Joined
Oct 22, 2011
Messages
32
Re: 53 Fastwin problems. . . AGAIN! :(

Are the coils original or were they replaced when you overhauled the ignition? When reinstalling the flywheel, did you properly torque the flywheel nut? If so, to what? If you did not properly torque the flywheel, you may have sheared the key.

After that, what is the compression on the motor? Should be the first thing you check in a no start scenario. Also, get an inline spark tester and set it to 3/8" gap. Having the actual plugs spark against the block tells you squat. You need a larger gap than 030.

If compression and spark check out, and the key is not sheared, spray some premixed fuel into the cylinder and try to fire it, does it now run for a couple seconds?

Great reply! I will check all these things out and see what happens. I replaced the coils when i did the ignition system tune up. I did not torque the flywheel nut though. Just snugged it down to something near what I figure was on it when I took it off. I did shear one drive key but when that happened there was no compression or anything like that when i pulled the chord. I will check it out though.

I will get a spark tester and a compression tester as well and see if those things check out.

Thanks for the help, its much appreciated!
 

HighTrim

Supreme Mariner
Joined
Jun 21, 2007
Messages
10,486
Re: 53 Fastwin problems. . . AGAIN! :(

Must be torqued to 40 ft/lbs, and do not use a hardware store key
 

1946Zephyr

Vice Admiral
Joined
Oct 21, 2008
Messages
5,556
Re: 53 Fastwin problems. . . AGAIN! :(

You can't throw that old 15 in the lake, because THAT IS A REAL MOTOR. :D:D Tuned up properly, (just like anything else) and those are great motors. Unfortunately, too many of these oldies suffer from neglect and too many people think that they can just go out there year after year and run the **** out of them without taking care of them. It won't work on your car and it won't work on your 59 year old outboard. Tune it up nice and you'll have a good reliable runner. ;)
 

Kelpy

Seaman Apprentice
Joined
Oct 22, 2011
Messages
32
Re: 53 Fastwin problems. . . AGAIN! :(

So, I checked the compression and its at 65,75. Maybe 70,80 on a good pull. I pulled off the flywheel and indeed the drive key was in pieces. Replaced that, torqued the nut. Tested the plugs with an inline spark checker (kind with the light inside), it indeed lights when I pull the cord.

Put it all back together and headed out to the river today. It started hard after several pulls, have to put the choke on and pull then give it gas or else it will die. After about 25 tries it went and we were off. Ran great to the first spot, then we fished for 6 hours. Started and ran great to the second spot, then we went to the third spot and made a drift. At the end of the drift the motor would kind of want to start, pop a few times but wouldn't go. I broke the cord pulling so many times and so we went home with the trolling motor. . . again! :(

Checked the drive key thinking that that was the problem, but nope, it looks great. What is going on with this thing? Is the compression just too low? Give me the skinny before I sink some more money into the hunk of crap!

Thanks for your help again fellas! Kelpy
 

Daviet

Fleet Admiral
Joined
Sep 24, 2008
Messages
8,958
Re: 53 Fastwin problems. . . AGAIN! :(

Kelpy, all it takes to make your engine run is timed spark, compression and fuel.
You have checked the flywheel key, it is OK. You need to check the spark with an air gap tester, the spark needs to jump a 1/4" air gap and be bright blue.
You compression should be OK, might come up a little with usage.
That leaves fuel, does your choke work properly, is it closing all the way?
When you cleaned the carb the first time, did you remove the core plug on top of the carb and clean the passages in there?
Is your level set properly, how about your needle valves? Low speed about 3/4 turn out from lightly seated, high speed about 1 1/4 turn open from lightly seated? Of course you would have to fine tune them on the water.
Just a couple of things to think about.
If you decide to through in the lake, would you please find a shallow one close to me, I'am to old to dive down and get it and I don't like getting that wet anymore.:D
 

82rude

Rear Admiral
Joined
May 8, 2012
Messages
4,082
Re: 53 Fastwin problems. . . AGAIN! :(

taking a long shot here,are all the cotterpins on the carb linkages?i forgot one on my 53 25hp evinrude and it caused all sorts of starting issues just like your experncing.
 

Kelpy

Seaman Apprentice
Joined
Oct 22, 2011
Messages
32
Re: 53 Fastwin problems. . . AGAIN! :(

taking a long shot here,are all the cotterpins on the carb linkages?i forgot one on my 53 25hp evinrude and it caused all sorts of starting issues just like your experncing.

Checked the linkage and it looks good. . . No missing pins that I can see.
 
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