Where did I go wrong?

[marcysibyll]

The 1959 18 hp FastTwin w/ 20 hp power head refuses to fire. Have the adj screws at the start point- HI speed 1 turn out, low 1 1/2 out. Got choke linkage hooked up correctly, got spark and compression. <br />Float was set at right hight, level with carb body. <br />Primer bulb is pumped till hard. <br /><br />Going to pull carb again and check it out. <br /><br />Any advixe will be appreciated

 

[Paul Moir]

Re: Where did I go wrong?

Put a little fuel/oil mix in a spray bottle. Spray it down the carb's throat and attempt to fire. If that doesn't work, pull the spark plugs, and spray a couple squirts in, reinstall and re-test. <br />If it fires on any of that, that confirms a fuel problem.<br /><br />One last thing - you have got the spark plug leads the right way around right? Forwardmost coil feeds the top cylinder.

 

[marcysibyll]

Re: Where did I go wrong?

Wanted to fire - ran a little, about 3 sec. with gas mix in cyl. Don't like doing that. Getting some Sea Foam to put in plug hole. <br /><br />If no success there, will take apart carb, again.<br />Thanks Paul

 

[Paul Moir]

Re: Where did I go wrong?

Yeah, fuel is not getting out of the carb and into the engine then. Are you sure the carb is filling up with fuel? IE, the float isn't stuck is it?

 

[marcysibyll]

Re: Where did I go wrong?

Had carb apart again. Clean and nothing hanging up.<br /><br />I get fuel out the fuel line when I pump the primer bulb. What are the chances that I have a bad fuel pump. <br /><br />Had it running for about 2 min on Sea Foam in the spark plug.

 

[Solittle]

Re: Where did I go wrong?

You may have crud in the carb that you can't see. It is best to blow out all the little passages with high pressure compressed air.

 

[marcysibyll]

Re: Where did I go wrong?

Did all the above- incl blowing out passages both ways with 90 psi compressed air. <br /><br />I'm going back to plan A- find a late 60's early70's 18 to 25hp outboard with a bad power head. Use the 20 hp power head as a donor. Then will have lower unit for sale.<br /><br />Had the $150.00 eBay 20 hp Johnson out this morning.( 1971 ) No fish n(don't have to clean them) and the motor ran like a champ.<br />Before next season, it's drop lu for new seals and water pump.

 

[Paul Moir]

Re: Where did I go wrong?

Oh shoot, I think we're overlooking something big here. You say you have a 20hp powerhead but you also have adjustable high and low mixture controls? So then you've got a '59 18hp carb on a 20hp engine right? The carb settings might be very very different from the normal 1 turn out & 1 and 1/2 turns out. Probably out more.<br />If you got it to run for two minutes, you must be close. The sea foam was gone from the cylinder in a couple seconds, no matter how much you put in.