‘63 Evinrude 3302s 3hp questions

[Wrenchit]

Hi,

I am working on a 3hp evinrude for a guy. He brought it to me not running and missing the throttle linkages. I was able to get the missing parts from a couple eBay auctions. Cleaned the carb all out and put new plugs in it and cleaned the gas tank. The engine won’t start and it’s not looking like it’s drawing gas into the engine (plugs are dry) checked the reeds, they are in good shape and sealing. I checked compression and I’m only getting 75psi in each cylinder. I noticed someone put a newer head gasket on it, who knows if it’s the correct thickness or torqued correctly. I am guessing that isn’t enough compression to draw gas? Also just noticed it isnt getting spark so I will check/adjust the points later.

Any directions is appreciated.

Thanks

 

[racerone]

Carburetor / fuel issues usually turn out to be something else.---Not a compression issue.-----Pull the flywheel.----If the 2 coils are original it needs a new set.----If coils have been replaced ( most have been ) you might clean and set the breaker pointes.

 

[Wrenchit]

Carburetor / fuel issues usually turn out to be something else.---Not a compression issue.-----Pull the flywheel.----If the 2 coils are original it needs a new set.----If coils have been replaced ( most have been ) you might clean and set the breaker pointes.

Ok, I know it’s getting fuel. I have drained the bowl several times. Main jet is cleaned out all other offices cleaned too.

Thank you

 

[Wrenchit]

Carburetor / fuel issues usually turn out to be something else.---Not a compression issue.-----Pull the flywheel.----If the 2 coils are original it needs a new set.----If coils have been replaced ( most have been ) you might clean and set the breaker pointes.

Hey Racer, I went back through the carb and found a plugged jet, the one in the bottom of the bowl. Plugs are wet now.

Regarding the points and coils. They all look new to me, the coils are green in color but the plug wires are black look pretty old. The points open and close. Think I should throw coils at it?

 

[Crosbyman]

If I may..green coils likely ok condensers could be bad or points dirty
secondary high voltage boot should read 4-7 Koms to engine frame

make certain primary wires to the points do not rub against the moving parts (crank)

1953-1967 Evinrude 3HP Litetwin Tune UP Project Ignition System Tune-Up | Outboard Boat Motor Repair

www.outboard-boat-motor-repair.com

 

[racerone]

About 35 years ago I visited a marina looking for an alternator belt for an Atomic 4 inboard.---Place was closed.---Saw a fellow working on a 3 HP Johnson.-----Quickly determined that high speed jet was plugged.----Fixed that.----Folks came along seeking a mechanic to look at an Atomic 4.-----" We don't work here " , but I made an offer to help.-----Quickly determine that breaker point gap had closed up.-----Had that motor engine running like well.-----They found the belt I was looking for and handed it to me.----Delivered a case of 24 treats to my boat as well.----Sorry Wrenchit , I could not see , hear your motor in post #1, but you said that carburetor was CLEANED in post #1.

 

[Wrenchit]

If I may..green coils likely ok condensers could be bad or points dirty
secondary high voltage boot should read 4-7 Koms to engine frame

make certain primary wires to the points do not rub against the moving parts (crank)

1953-1967 Evinrude 3HP Litetwin Tune UP Project Ignition System Tune-Up | Outboard Boat Motor Repair

www.outboard-boat-motor-repair.com

What boot are you talking about? I didn’t see any grounds to the frame.

 

[Crosbyman]

sparkplug boot clip and engine frame should have continuity between
4-7 Kohms

Testing an Outboard Coil with a Multimeter using an ignition coil from the Johnson H or T

Multimeter testing of Johnson outboard coils

www.pochefamily.org

if you remove the coils you should see the same 4-7Kohms between the high voltage pin and either of the 2 primary wires

make certain you are using a resistance scale bigger than the expected resistance you plan to measure. See section Test the New Coils - on the 3hp ignition link I posted

 

[Wrenchit]

sparkplug boot clip and engine frame should have continuity between
4-7 Kohms

Testing an Outboard Coil with a Multimeter using an ignition coil from the Johnson H or T

Multimeter testing of Johnson outboard coils

www.pochefamily.org

if you remove the coils you should see the same 4-7Kohms between the high voltage pin and either of the 2 primary wires

make certain you are using a resistance scale bigger than the expected resistance you plan to measure. See section Test the New Coils - on the 3hp ignition link I posted

Thank you sir. Points and condensers are cheap enough. Is setting the gap as easy as rotating the crank to the “top” range then adjusting the gap? What shuts the engine off when you move the throttle all the way to the left? Does it just retard the timing enough to kill it?

What is considered good compression? Any recommendation for starting fuel adjustment?

Thank you for your time

 

[Crosbyman]

points.... set the cam at the highest point of the lobe & the rub block adjust the points to 0.020 see link below for a more elaborate procedure but doing it has suggested is usually fine.

1953-1967 Evinrude Johnson 3HP Tune UP Project Carburetor Tune Up | Outboard Boat Motor Repair

www.outboard-boat-motor-repair.com

see section called Adjusting the Slow Speed Needle


clean the points with fine 220+ grit paper and rinse with carb cleaner and odds are points are ok . Old condensers are frequenly an issue .

to learn about condensers see the link
(m.w.Mohat downloadable 1-4 articles )

be aware some users have recently complained about China points not openning up to .020 . just be on the look out

compression above 75 should keep it running.... imho anyway

higher the better of course

moving the throttle down past idle kill it

3hp are great simple engines check gearcase oil for water !!

 

[Wrenchit]

Thank you for the insight. The owner told me he has replaced the coils, points, and condensers. Explains why they look so new, but not why it doesn’t have spark.

 

[Crosbyman]

do you have 4-7koms between plug boot and engine frame ?
have the points been cleaned and adjusted to .020 ?
are the coils lined up properly on their bases ? see pict.
have you tried different sparkplugs set for .030 ?

sad to say but some chineese coils have been known to be defective
were his old coils actually all cracked or were they changed as being simply suspicious ? if so reinstall and retest with the old coils

 

[Wrenchit]

do you have 4-7koms between plug boot and engine frame ?
have the points been cleaned and adjusted to .020 ?
are the coils lined up properly on their bases ? see pict.
have you tried different sparkplugs set for .030 ?

sad to say but some chineese coils have been known to be defective
were his old coils actually all cracked or were they changed as being simply suspicious ? if so reinstall and retest with the old coils

The owner doesn’t have the old ones and can’t recall if they were cracked. Just said it didn’t have spark so he replaced it all except the plug wires. I don’t have an ohm meter so haven’t been able to test for that. I have tried several different spark plugs I have laying around with no change. I’m not so inclined to buy all new electrical components knowing the owner did that already and it didn’t help.

 

[Wrenchit]

do you have 4-7koms between plug boot and engine frame ?
have the points been cleaned and adjusted to .020 ?
are the coils lined up properly on their bases ? see pict.
have you tried different sparkplugs set for .030 ?

sad to say but some chineese coils have been known to be defective
were his old coils actually all cracked or were they changed as being simply suspicious ? if so reinstall and retest with the old coils

Regarding the coils, I didn’t line them up any specific way. I know one was sticking out too far when o put the flywheel back on because it was rubbing so I took the flywheel off and moved the coil in slightly.

 

[Crosbyman]

well without conclusive /precise reporting of the outcome of testing... determing the cause of the problem can not progress to happiness.

btw ohm meters today are cheap and can be purchased for $10 .. it needs to be in the tool box to work on oldies. !

it can be as simple as broken plug wires at flex points. see pict a meter will tell you.

When working on these older engines a few feet of metallic plug wires (7mm) is always a good investment. never use carbon fiber wires.

 

[Wrenchit]

well without conclusive /precise reporting of the outcome of testing... determing the cause of the problem can not progress to happiness.

btw ohm meters today are cheap and can be purchased for $10 .. it needs to be in the tool box to work on oldies. !

it can be as simple as broken plug wires at flex points. see pict a meter will tell you.

When working on these older engines a few feet of metallic plug wires (7mm) is always a good investment. never use carbon fiber wires.

Thank you. I will get a few feet of plug wire and new caps from marineengine.com, clean and readjust points and set the coils. See where that puts me.

 

[racerone]

Coils must be removed from magneto plate to properly install the plug wires.----Most wires need to be turned to screw onto the pin.

 

[Crosbyman]

fully remove the long "back corner bolts" on coils and 2 smaller base bolts next to the points.

the plate will come out ... take pictures if you need to remember the back side of the mag plate wiring layout !

lining up the long coil bolts and 2 base retainer screws to the base retainer ring is a bit tricky.

I line up the holes approx. and use a long sishkabob stick inserted in one screw bolt hole lined up with the base retainer holes. all 4 holes must be lined up ! ..... if not rotate the base retainer ring till all 4 holes line up .

After installing one of the 4 main mag plate bolts the rest (3) will lined up perfectly.
BEFORE bolting up the mag plate.... TEST the resistance from plug boot to coil primary wires look for 4-7Kohms.
use proper scale if using an analog needle meter
primary to primary should be close to 0-1 ohms

 

[Wrenchit]

fully remove the long "back corner bolts" on coils and 2 smaller base bolts next to the points.

the plate will come out ... take pictures if you need to remember the back side of the mag plate wiring layout !

lining up the long coil bolts and 2 base retainer screws to the base retainer ring is a bit tricky.

I line up the holes approx. and use a long sishkabob stick inserted in one screw bolt hole lined up with the base retainer holes. all 4 holes must be lined up ! ..... if not rotate the base retainer ring till all 4 holes line up .

After installing one of the 4 main mag plate bolts the rest (3) will lined up perfectly.
BEFORE bolting up the mag plate.... TEST the resistance from plug boot to coil primary wires look for 4-7Kohms.
use proper scale if using an analog needle meter
primary to primary should be close to 0-1 ohms

You wouldn’t happen to have a picture of that would you? I already had the coils off of it and trimmed about 1/2” of both spark plug wires. Is there another reason for me to take of the mag plate?

 

[Crosbyman]

IF you have continuity to the coil possibly not but it can be a guessing game if the plug wire is broken in a bend somewhere under the plate. (can't tell from here )

In any event to continue testing you must acquire test equipment like a VOM which is a basic necessity .


until you test continuity to the boot from each primary it is like changing light bulbs with no power in the socket

it is up to you