1999 Challenger - 1 engine will not turn over

[racerxxx]

I wouldn't fault the guy but most people just go to the store pick up "2 stroke" oil and go to town, never once checking what the rating is on the jug. The only thing that scared me was his comment about the oil being too thin by eye. Like they say, you can't judge a book by it cover. And it's not like the TC-W3 will kill the engines immediately. Now unfortunately the oil tank should be drained and filled with the correct oil that is going to be ran in the boat, sometimes cross mixing oils they can gel.

As far as break in, that is the tough part. I just put 2 SBT's in a guys 99 Challenger last season and when we took it to the river we got on plane and cruised and varied the throttles but never really got below 4K and never above 6K. Once you dip below 4K or 3K I feel as though you're working the engines too much as your off plane and just plowing the water. You can check out that redo here.

 

[Jims5543]

I am not sure what to do.

What I have learned here and on SBT's website and what the shop told me to do are 180° from each other.

The shop break in instructions were to idle the engine in the water for 1 hour then for the next hour go to 2K RPM then 3K for the next hour and so on. No mention of varying throttle or anything.

I found this on SBT's website:
http://www.shopsbt.com/forum/technical-articles-f-q/13960-breaking-new-engine.html

Completely different instructions the only similarity is the number 10 as in 10 gallons not 10 hours.

The other problem I am having is with the premixing. I am positive the shop put TC-W3 oil in my oil tank and in my gas tank.

I am going to drain the oil tank and put API-TC oil in but what do I do about the gas tank. There was only about 5 gallons in it and it was about 3-4 months old (stabilized) I was going to add 10 gallons to the tank and premix 50:1 the new stuff, what do I use, do I mix API-TC with TC-W3 in the gas? Is that O.K. to do?

I do not want to screw anything up here I am just trying to do what is best for the engines.

 

[Jims5543]

After extensive searching all over town I finally found some Sea Doo oil, the only place that carries it locally is a Sea Doo shop, I purchased the last gallon they had.

I was planning on draining my tank and noticed the shop put my oil in so there was no need to replace it and I really did not need to buy the extra gallon. I tried to not over think this and just run her.

Break in is going o.k.

I did my first hour of running. I suspect the premix in my gas is too rich. I added 10 gallons to the tank noting where it was before I started (gauge does not work, that is a project down the line) I did the recommended 50:1 ratio per SBT website.

I fouled at least 1 plug during the initial 30 minutes staying below 2K RPM. So I changed them while doing my 30 minute cool down. Then she ran better. I did the next 4K RPM 30 minute run and called it an evening.

Some issues were there, the one engine had its idle set too low and kept stalling when at idle I adjusted that. I also had a throttle handle too loose and was not holding in place, I adjusted that as well.

My big concern is she seems to be taking on water. I kept the bilge running on and off and decided to leave it off on the way in and she had a decent amount of water in the hull when we got back in. Like 3" worth in the back.

She was exposed to the elements while being worked on and was drenched by a bad storm so I am hoping that was the reason for all the water.

She is very drained out now, so I will watch that close on the next run one evening this week.


Question:

Can I clean up the plugs with 30 minutes run time (I have a sand blaster for spark plugs) and re use them? Or is a fouled plug done and is best tossed away?

I hate tossing plugs that are 30 minutes old.

 

[Coastiejoe]

You will want to see if the incoming water is the carbon seal. Two reasons. If so and it is bad the boat can sink, it will allow for cavitation by pulling air from inside the hull right into the impeller.


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[Jims5543]

You will want to see if the incoming water is the carbon seal. Two reasons. If so and it is bad the boat can sink, it will allow for cavitation by pulling air from inside the hull right into the impeller.


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Well, it is not gushing in, it is very slight. If it was gushing in I would be able to see where it was coming from.

When we launched I did not take it off the trailer right away, I backed it down the ramp (on Friday afternoon @ 2 PM when the place was empty) with the engine cover up. Then jumped in and watched the hull, no water was gushing in anywhere, I was prepared to pull it out if there was a catastrophic leak. There was none so I decided to put her in all the way and get to work.

I ran the bilge a lot just to be safe, then decided to leave it off and keep an eye on things, I am a bit paranoid right now so I am hoping it is just my paranoia kicking in.

I will keep a closer eye on it this next outing.

I found a pic online, I did not see a drop of water coming in from here and I remember looking at this point and watching it.