sfitzgerald351

09-19-2012, 01:28 AM

After a few years away from the board (little kids and work will do that), I'm hoping the gang here can help me out.

I've got an 84 S&S with a 454 and a 4010 carb. We moved to Denver last winter and I've only had a chance to get out on the water a couple of times, but my boat is incredibly hard to start here. I did have the boat winterized here and tuned for the altitude by the local MC dealer. All they did was adjust the idle A/F mixture. I also repropped the boat. Once started it idles smooth and runs great. WOT is right at 4400 where it should be. It idles about 700 or so very nicely. I do notice a bit of a loss of power which is to be expected, but other than starting the boat seems to run great.

When cold, I haven't figured out the trick yet. It seems to take a 4-5 (or more) tries with lots of pumping and holding the throttle wide open to get it to kick over. When warm it'll start with just a bump of the key if it hasn't been off for more than a minute or two. After that, it'll take a pump or two and will then fire up.

At sea level, to start it I'd give it a good 4 or 5 pumps, leave it at half throttle and it'd generally fire on the first try. When warm, I'd occasionally have to give it a single pump if we sat for more than 5-10 minutes.

I'm at 6,000 feet now and heading up to 8,000 next weekend for a less crowded lake and some fall folliage and hope to improve this prior to then.

Unfortunately I was laid off late this summer (but seem to have good prospects) so taking it back to the dealer is out of the question right now.

Any help on where to start with this one is appreciated. I was thinking choke, but not sure how to start diagnosing this one.

Thanks!

Scott

I've got an 84 S&S with a 454 and a 4010 carb. We moved to Denver last winter and I've only had a chance to get out on the water a couple of times, but my boat is incredibly hard to start here. I did have the boat winterized here and tuned for the altitude by the local MC dealer. All they did was adjust the idle A/F mixture. I also repropped the boat. Once started it idles smooth and runs great. WOT is right at 4400 where it should be. It idles about 700 or so very nicely. I do notice a bit of a loss of power which is to be expected, but other than starting the boat seems to run great.

When cold, I haven't figured out the trick yet. It seems to take a 4-5 (or more) tries with lots of pumping and holding the throttle wide open to get it to kick over. When warm it'll start with just a bump of the key if it hasn't been off for more than a minute or two. After that, it'll take a pump or two and will then fire up.

At sea level, to start it I'd give it a good 4 or 5 pumps, leave it at half throttle and it'd generally fire on the first try. When warm, I'd occasionally have to give it a single pump if we sat for more than 5-10 minutes.

I'm at 6,000 feet now and heading up to 8,000 next weekend for a less crowded lake and some fall folliage and hope to improve this prior to then.

Unfortunately I was laid off late this summer (but seem to have good prospects) so taking it back to the dealer is out of the question right now.

Any help on where to start with this one is appreciated. I was thinking choke, but not sure how to start diagnosing this one.

Thanks!

Scott