1989 Force 50 HP Flywheel turns but engine won't start?

[bbar97]

Hey everyone, so I'm trying to fix up an old 50 HP 1989 Force Engine, and so far I checked all the electrical connections, bought a new battery, and bought new gas and added a 50:1 mixture of oil. At first we couldn't even get the flywheel to spin, and we heard a muffled click/pop noise, and we figured out it was the starter, so I replaced it and now the starter will turn the flywheel but nothing happens after that. I have limited knowledge of engines and I'm doing my best to systematically troubleshoot but my lack of knowledge has me stuck. I took off the carburetor and tried cleaning it and it all seemed clean already, and I checked to see if the fuel would pump into it when I squeeze the diaphragm which it does. What else can I do to figure out what the problem is? Thanks!!!

 

[roscoe]

Welcome to iboats.

A shop manual will help.
A generic repair manual by CLYMER will get you through most repairs, and has general sections that will educate you on how a 2 cycle outboard operates. Some manuals are available online for free, others you pay for access, maybe someone can provide a link for you. I prefer a hard copy of the manual.

Your engine needs 3 things to run.
Fuel to the cylinders.
Spark.
And compression.

So there are your first 3 things to determine.

 

[jerryjerry05]

Model#??

Start with a compression test.
​Then a spark test.

What ignition system do you have?

​You using the choke when trying to start? You using fast idle in the shifter?

 

[bbar97]

Model Number: 507R9B

Do I need special tools for a compression test?
Should It be on full choke when I try to start it?
What is fast idle?

 

[jerryjerry05]

You have a manual/electric choke.
It only chokes when the key is pushed in as you turn the motor over.

​I think you might be able to get loaner tools for a compression test(maybe)
They're not that expensive.

Google comp test and you should get a few video's.

The important thing is don't use the key to do the test.

​Pull all the plugs, screw in the tester and turn it over until the gauge stops going up.
On the start solenoid is a yellow/red wire.
​When energized it send power to the starter to turn the motor over.
A jump box or jumper wire works good.

Fast idle. The shifter handle pulls out and when pushed forward it allows the linkage to accelerate the motor while not engaging the gears.
Grab handle and pull straight out. Should pull about 1/2"
Push forward.
That can allow the engine to rev up to about 2500-3000.
That along with the choke should allow the engine to start.

​Do the comp test and post the results.

With a good tester the results should be 145-155#.
​The results on all 3 should be close.
All 3 at 120 good.
2 at 120 and 1 at 50 not good.
Different(cheaper) gauges will have different results.