Question For Mr. D. (Dhadley)

[OBJ]

Fellow brought in a 150 ST. He said it wouldn't get up and go. (He was in the Pittsburgh BASS Master Classic). Well, pulled the hood and the fuel lines were like rocks, the VRO pump wouldn't pump jello on a bet....pump the bulb and the carbs looked like Niagra Falls.<br /><br />Compresssion is 80psi per cylinder. All spark good across a 1/2 inch gap.<br /><br />This is what really took me cause I never seen this before....the carbs. Upper and lower carbs are the same...flat tops, 1 3/8" throats with .038 main jets. But the middle is 1 15/16" with .034 mains and are not flat tops. Did some research and found that the flat tops were installed on the "conventional" 150's/175's and the...well, rounded tops on the ST's.<br /><br />So I called the guy and asked about it. He said he didn't know about the carbs being different. He bought the engine and had it rigged to his Ranger. Said it ran well up till a couple weeks ago before the Classic...(he didn't know that boats were being furnished for the Classic)<br /><br />I guess my question is, in your opinion, will this middle carb be any problem or maybe create a problem...in the long run? The man said it has ran good until now. I didn't think to ask how long it's been on the boat. I'm kinda stumped on this. Got some thoughts like running lean on #3 and 4 cylinder but if he's been running for a while, those cylinders don't seem to be any worse for wear than the others. And if I read correctly, the bores are the same.<br /><br />Signed..<br /><br />Stumped in Ohio....

 

[walleyehed]

Re: Question For Mr. D. (Dhadley)

Just cruising through, OBJ.... is this a looper??? sounds like a crossflow?? No??<br />Or are you meaning "ST" as in 2001, or GT/XP?<br />Don't ya love the silly questions??

 

[OBJ]

Re: Question For Mr. D. (Dhadley)

Dummy me always asking for years and I forget to post it myself...DOH!! It's a crossflow......crap....can't remember the year....well, heading for the shop anyhow. Post it down there.<br /><br />Thanks Kenny.

 

[Dhadley]

Re: Question For Mr. D. (Dhadley)

It should be a 150STLC...which means its an XP/GT. All those were pretty much the same -- cf V6 with decent heads. <br /><br />Speaking of heads and since we know we have a Heinz 57, look at the numbers on the head to make sure we have XP/GT heads. <br /><br />Is the odd carb a 1 5/16" or really a 1 15/16"? If its 1 5/16 I think thats what should be there. The 1 3/8 were on bigger motors like the 2.6 XP/GT. They will work but suck up a lot of fuel on 150/175/200 port timing. The 1 5/16 will work, overall, a lot better unless this guy is at 7000 rpm, which I doubt.

 

[OBJ]

Re: Question For Mr. D. (Dhadley)

Thanks Mr. D. The part numbers on the heads (322544/5) are consistant with what the parts book lists for the GT model. The engine model is J150STLCDC. The odd carb is a 1 5/16". Wrote it down while doing the inital go over.... . <br /><br />Many thanks for your input and help.

 

[walleyehed]

Re: Question For Mr. D. (Dhadley)

OBJ, being the curious fart that I am...can you confirm the .034 and .038 mains????<br />I was thinkin' those otta be 56-57 up...????

 

[OBJ]

Re: Question For Mr. D. (Dhadley)

Yep, your right. Don't know what the crap I was thinking of. Upper and lower carbs running 59's and the middle carb 56's. Had to recheck my notes.....lotta' good they do me.....

 

[walleyehed]

Re: Question For Mr. D. (Dhadley)

Not important to what you were trying to get figured out, but the mains were throwing me for a spin, and I just had to know!!!