97 Speedster twin 717

[dogface7130]

I'm new to this whole form thing I just bought a brand new rebuilt motor from sbt.com and was wondering what I should set the carburetor at for a new stock motor for the Jets screws and what the idle should be thank you

 

[snikwad003]

check the service manual, it will be your friend for your engine replacement endevor. you need to align the engine also.

 

[dogface7130]

Yes I got the alignment tool and everything is there any tips on easier ways to do it or just do it by the alignment tool

 

[snikwad003]

The alignment tool is fool proof. The carb spes will be in the manual too, I dont have them for the 717.

 

[dogface7130]

Ok thanks just trying to get all the info I can b4 I take this one

 

[ORION '95 Speedster]

If your putting a new motor in, here is some info to consider:
1)Use pre-mix in the first tank or two in addition to the stock oil injection.
2)Warm up the engine before giving it more than 20% throttle. (you should always do this, not just during break in)
3)DON'T use synthetic oil until after the break-in is done.
4)Make sure your not running lean (Intake air leaks, clogged fuel filter, clogged carb, failing fuel pump, wrong jets, etc)
5)Make sure your oil injection system is working perfectly, with no cracked hoses or out of adjustment.
6)Put duct tape over the engine openings during the installation (intake, exhaust, spark plug hole, etc)
7)Before first firing the motor, ground the plug wires and fog the intake and the spark plug holes.
8)Heat cycle the motor 3 or 4 times before taking it for the first ride around the lake.
9)Keep it below 50% throttle for the first hour (ya right, never going to happen)
10)Keep it below 75% throttle for the first tank of gas. (ya right, never going to happen)

ASSUME that it is going to break down, and have a backup plan of some sort. Stay close to shore, bring a buddy boat, etc.

 

[dogface7130]

Now one question that I do have with me having one new rebuilt motor and one older motor is that going to affect the performance of it and thank you for the hints

 

[ORION '95 Speedster]

Do not push the new motor too hard. Your boat should top out at 75% for a while. There are two throttle levers for a reason, so you can "baby" a new motor. Let the new motor try to keep up, rather than lead the pack. Let it stretch its legs for a while before it goes full steam.

 

[dogface7130]

Yes I hear that thank u for all the help I will keep u posted

 

[dogface7130]

Okay I'm almost ready to put the motor in and was wondering what the easiest way to check the oil injection system to make sure it's working properly

 

[ORION '95 Speedster]

One way to test the injection system is to replace the small oil lines that go from the pump to the motor. Start the engine, and watch the oil flow through the line. Once the line is full, you can no longer check for oil flow without clearing the line again. Another way is to remove the oil pump, and spin it up with a drill and check for function. Make sure to replace your inline oil filters before using the new motor. Running pre-mix buys you a little time while you are checking the pumps for function.

 

[dogface7130]

Thank you I will check that out tomorrow is there any other little things I should be watching for when I put the motor in and fire it

 

[ORION '95 Speedster]

Here is a list of things that will be bad for your new motor:

1) A lean fuel ratio will quickly destroy the engine. (can be caused by many things, make sure you know what they all are)
2) Insufficient oil will destroy the engine (again, can be caused by many things)
3) Improper engine break in procedure will shorten the life and performance of the engine.
4) Clogged or restricted cooling system will destroy the engine
5) Getting water inside the engine by improperly back flushing can damage to the motor
6) Be very careful to avoid dropping things into the motor during installation. A washer in the intake will kill it.

Those are very vague, but cover the general topics.

Engines generally never "wear out". They break down because something went wrong. They are specifically designed to run "forever". No, nothing lasts forever, but if you were to provide all of the perfect conditions for an engine, it would last an incredibly long time. If all conditions were perfect, there will be almost no degradation of the motor during its operation. Engines break down slowly or quickly, depending on what condition is damaging the engine. The oil was not the right type, the fuel ratio was off, the torque specs were not ideal, there is dirt getting sucked into the intake, the motor is stored improperly and water evaporates back up into the motor, the wrong spark plugs are used, the fuel quality is low, the cooling system is restricted, its over worked, etc etc etc.