6 HP carb jets

[carlisle]

Since the high speed adjustment isn't on the Evinrude 6502 carb, can one buy different sized jets? Mine seems to eat a lot of gas, foul the plugs (very black, oily insulator), and barely gets my little 12 foot semi-V up on the step.<br /><br />The engine is freshly rebuilt (by ?) and doesn't leak any gas (e.i., float isn't stuck) and after a few hours, doesn't seem to idle as well unless the plugs are cleaned/replaced.<br /><br />CHRIS

 

[ezeke]

Re: 6 HP carb jets

Was the motor rebuilt in Sioux Falls? I'm wondering if it was set up for your elevation which I guess is 1400'.

 

[carlisle]

Re: 6 HP carb jets

I think it was rebuilt in Iowa; about the same altitude, 1500 ft.<br /><br />CHRIS

 

[Xcusme]

Re: 6 HP carb jets

Chris,<br /><br />You have a 1965 6HP there. You say the motor was rebuilt...rebuilt how?? New pistons, rings, powerhead seals?? Carb rebuild?? Sounds like a flooding condition. Remove carb, remove lower bowl. Check to see that the float needle valve is sealing and at the right height (invert bowl, float should be level with edge of bowl.) Clean with carb cleaner, blow out passages with compressed air. Check compression and look for strong blue spark from each plug wire to powerhead. Check thermostat, replace if it's missing or faulty. Check point gap and look for cracked coils. Do a link and sync of carb linkage. Close low speed idle valve, open 1-1/2 turns, start motor, when warm, start closing low speed idle valve in 1/8 turns, allowing 15 seconds between adjustments until motor starts to run rough (too lean). Open valve at bit (1/4 turn) to produce a steady, smooth idle.

 

[carlisle]

Re: 6 HP carb jets

Thanks...Good question. I was told it was rebuilt when I bought it but have no way to verify. The carb procedure you describe sounds like not only a good idea but fun, and a good way to get to know the engine. Then I can look at the high speed jet too for size and appropriateness. <br /><br />CHRIS

 

[Xcusme]

Re: 6 HP carb jets

CHRIS <br /><br />All you can do, most of the time, is take the sellers word for the condition of any motor unless you're able to check out the motor before sale by running a compression test, spark test and 'on the water' testing. Yes, it can be fun to do you're own work, with a manual that is! The parts are relatively cheap and you can learn a lot about the motor at the same time. Keep us posted here on the forum of your progress. You're exploits can help others. Feel free to ask any questions. There's are a great bunch of folks here to help if you need any tips or advice.