50 force model number

puddle jumper

puddle jumper

Captain
Joined
Jul 5, 2006
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3,830
This my model number on my force motor
507Y9B
50- engine size
7-???
Y-???
9- 1989 model year i think
B-model year update i think

If im wrong can some one corect me please
also what is the spark plug gap for this engine
my manual only shows the gap for the early model 50 force
thank you
pj
 
roscoe

roscoe

Supreme Mariner
Joined
Oct 30, 2002
Messages
21,665
Re: 50 force model number

50 hp
7 - electric start - no power trim
Y - Made for a Blue Fin boat , usually refers to decal set
9 - 1989
B - mid year model version.

You should be using Champion UL18V or NGK BUHX.

They are surface gap plugs like this one:

NGK2422%2D2%2Ejpg


If you are using a different plug, try .030 gap.
 
puddle jumper

puddle jumper

Captain
Joined
Jul 5, 2006
Messages
3,830
Re: 50 force model number

Can you tell me if the center electrode plug is a better choice plug or is the gapable plug ok to run?
pj
 
roscoe

roscoe

Supreme Mariner
Joined
Oct 30, 2002
Messages
21,665
Re: 50 force model number

The surface gap plugs don't seem to foul out like the conventional plugs do.
They are easy to clean, and they are what is recommended by the manufacturer.

ANother tip, switch to synthetic oil.
Sure, you will spend a little more, but you can get it for $20 a gallon, enough for 50 gallons of gas.

Your motor will not smoke (after you get the old oil burned out), and you won't have to worry about the plugs.
 
puddle jumper

puddle jumper

Captain
Joined
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Messages
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Re: 50 force model number

roscoe thank for the info
Il have to see if i can find that style of plug
 
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