Johnson 150/175 carb saw

[Mclintock]

I have these carbs on my boat I just bought it has a 85 Johnson 150. Is this wrong size carbs or will it work as of now she don’t want to run right hard start.

 

[jimmbo]

A Genuine OMC Service Manual, might have the Specs. Have you looked in any Parts Lists?

But... Why are you concerned about whether the Carbs are the correct Size?

 

[racerone]

Model # of this 150 ?-----Is it a GT 150 ?

 

[racerone]

Carburetor has nothing to do with starting.----Are you pushing in the key in while cranking it over ?-----The electric primer valve puts fuel directly into the intake air.----This fuel bypasses the metering circuits of the carburetors.

 

[Mclintock]

A Genuine OMC Service Manual, might have the Specs. Have you looked in any Parts Lists?

But... Why are you concerned about whether the Carbs are the correct Size

 

[Mclintock]

Boat will not start it just turns over and over. Now something else went out because when I turn key nothing happens no click nothing.

 

[Mclintock]

Yes I have one but it’s a copy of a genuine one but no specs.

 

[Mclintock]

Carburetor has nothing to do with starting.----Are you pushing in the key in while cranking it over ?-----The electric primer valve puts fuel directly into the intake air.----This fuel bypasses the metering circuits of the carburetors.

Yes I turn key push in for 10 seconds and choke it and it will fire sometimes but not right after. Now something else has went out because now I turn key nothing happens. No click nothing. I can bump selenoid and it turns over.

 

[Mclintock]

Yes I turn key push in for 10 seconds and choke it and it will fire sometimes but not right after. Now something else has went out because now I turn key nothing happens. No click nothing. I can bump selenoid and it turns over.

Am I supposed to be holding key all the way in while starting or just to choke?

 

[Chris1956]

You must hold key in while cranking for choking action.

 

[racerone]

When you push the key in ( not cranking ) the electric primer valve opens.----And it does nothing if there is no fuel pressure to it.-----So when motor is cranking the fuel pump puts pressure to it.-----Fuel from primer valve then sprays directly into the intake air flow.-----Very simple unit first installed in about 1980.-----Stayed the same for 35 years.-----Used on motors from 9.9 to 300 HP.----Far better than choke flappers.-----And did you check for a blown fuse when there was no " click " from motor ?

 

[saltchuckmatt]

Yes, check fuse located near starter solenoid. Rubber boot it in.

If it's good probably bad or corroded wires.

Always wondered what the "GT" stood for?

 

[Mclintock]

Yes, check fuse located near starter solenoid. Rubber boot it in.

If it's good probably bad or corroded wires.

Always wondered what the "GT" stood for?

Thanks

 

[Mclintock]

Yes, check fuse located near starter solenoid. Rubber boot it in.

If it's good probably bad or corroded wires.

Always wondered what the "GT" stood for?

Thanks I’ll check

 

[Mclintock]

Model # of this 150 ?-----Is it a GT 150 ?

No i bought those decals for it

 

[saltchuckmatt]

I've got a GT 100....

 

[Mclintock]

When you push the key in ( not cranking ) the electric primer valve opens.----And it does nothing if there is no fuel pressure to it.-----So when motor is cranking the fuel pump puts pressure to it.-----Fuel from primer valve then sprays directly into the intake air flow.-----Very simple unit first installed in about 1980.-----Stayed the same for 35 years.-----Used on motors from 9.9 to 300 HP.----Far better than choke flappers.-----And did you check for a blown fuse when there was no " click " from motor ?

 

[Mclintock]

Found blown fuse and now choke works but still won’t turn over?

 

[Chris1956]

So it is back to cranking but not firing? If so, spray some 50::1 fuel into the carb throats and see if it will run for a second or so.