Is there any way to know if I have a problem with my msd tl system. I have a blaster that I just finished rebuilding. It has single trigger TL system and it is running like crap. Out of the water after warming up for a minute if you give it gas it sputters and backfires. The plugs are very wet. When in the water it won't rev up at all and just barely keeps running. Could the brain be cooked?
MSD TL testing
- Thread starter coldblaster
- Start date
SUPERTUNE
Race Gas Rules
- Location
- Clearwater Fl.
Post a pic of what model...Is it one of the older analog MSD? if so they were junk...
Kennay
Squarenose for the _____
- Location
- Myrtle Beach, SC
Bad plug wires?
Bad coil?
Air gap between the fw and pick up?
Cleaned all your grounds to "Flawless" status?
Checked all connections for corrosion or a faulty connector or wire?
I could go on... you need to tell us what you have already checked and pics would be nice so we can see your setup. And honestly, I don't much know what the hell i am talking about, but if you answer my questions, someone will help you :bananalama:
Bad coil?
Air gap between the fw and pick up?
Cleaned all your grounds to "Flawless" status?
Checked all connections for corrosion or a faulty connector or wire?
I could go on... you need to tell us what you have already checked and pics would be nice so we can see your setup. And honestly, I don't much know what the hell i am talking about, but if you answer my questions, someone will help you :bananalama:
D-Roc
I forgot!
- Location
- Dirty River Rider
backfire sure sounds like a timing issue = ignition. do the check list above and post back the results.
It is the older style msd.. Coil was replaced becuase it was only running on one cylinder. I will check all connections, what should the air gap be set at?
WFO Speedracer
A lifetime ban is like a lifetime warranty !
- Location
- Alabama
I know a lot of peeps running the old analog MSD TL systems,they seem to run pretty good for junk parts.:spam:
Mouthfulloflake
ISJWTA member #2
- Location
- NW Arkansas
Ive been told and read that they are more reliable than the single pickup first generation Digital boxes
Kennay
Squarenose for the _____
- Location
- Myrtle Beach, SC
A lot of people say ******** like that here on this good old website... the creditability of such people though.... well, Frankly, who knows? And no, I'm not talking about good ol' Chucky. It's more of the common joe passing info on that some other random joe said.
Mouthfulloflake
ISJWTA member #2
- Location
- NW Arkansas
ive seen LOTS of guys Matt_E, and Superjett off the top of my head have issues with the single coil digital systems...
but yeah, who knows...
but yeah, who knows...
How about this, I ran an 'old style' analog MSD for 6-7 years before selling the ski in 2001-2002, and just heard last year it was still running, on the same ignition.
I ran a newer single channel digital and lost the brain within a few months.
Anecdotal evidence, yes, but my experience.
I ran a newer single channel digital and lost the brain within a few months.
Anecdotal evidence, yes, but my experience.
Kennay
Squarenose for the _____
- Location
- Myrtle Beach, SC
That is exactly why my next TL system will come to me brand new and in a factory sealed box. You never know what has been done to anything that isn't yours.
What should the air gap be between the FW and the pickup??
Mouthfulloflake
ISJWTA member #2
- Location
- NW Arkansas
http://www.msdpowersports.com/instructions.html
scroll down to watercraft, then select the one you have and look it up.
scroll down to watercraft, then select the one you have and look it up.
D-Roc
I forgot!
- Location
- Dirty River Rider
i don't think msd has the instructions for the old anolog system online. someone should have them though and hopefully can post the gap spec for the old anolog system.
I now have the air gap at 0.075" which is between the 0.050 and 0.096" msd recomends. it still backfires when reving out of the water but only the pto cyl. I have a pic here.. any other recomendations?? carbs??reeds?? I have eliminated almost everything now on the ignition side. It is a old msd 4270...In the pic it is the cyl on the left that is backfiring
Attachments
D-Roc
I forgot!
- Location
- Dirty River Rider
it looks like the front cylinder isn't firing at all. do you have spark on both plugs? good compression on both cylinders? is one carb not flowing fuel?
I am sure they are both firing. Comp is equal but it is low only 130 psi. I have a new head and just need to machine the domes tommorow with proper squish. I don't know about the carbs.. it is hard to tell from the pics but both pistons were wet, I thought the front one was good (slight film) but the rear was rich and carbonish (if thats a word..kind of oily). What can I check in the carbs
crammit442
makin' legs
- Location
- here
T-Bone(Seinfeld) always says analog systems are junk
. I agree that the newest systems are better, but there are a lot of guys running analog systems successfully. The single channel system we bought from JETT several years ago ran for a season on my boat, two years on 2nd Nature's boat, and is running just fine on the new owner's boat in Canada. Derek has one on his boat that's working just fine and I put a system together for Surfguy45 that's been working fine for two years also. I'm sure there have been failures, but we've had great luck with them.
D-Roc
I forgot!
- Location
- Dirty River Rider
to me it looks like your rear pto cylinder is a tad bit lean, but there is evidence of the port wash, barely. the front looks like it is rich or not burning fuel at all. the old anolog fires both plugs together if i remember correctly so if you think you are getting good spark at both plugs maybe check your timing. you got fuel compression and spark so a backfire makes me think timing.
Ok timing was way off... like 20 degrees adv too far... it is now set at 30 deg at close to idle. still backfires a bit. I noticed my motor must be out of alignment because the coupler was heating up. Here is a pic of the pistons now. Both heads were very wet, the front looks good I don't know about the pto still???
