582 high engine temp
in 2 Stroke Technical Questions
13 years ago
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by Nick Axworthy » 12 years ago
Also make sure those rads have the coolant flow they should have.
Thank you said by: Michael Regan
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by bill martin » 12 years ago
Mike,
You can pick up a comression gauge pretty cheaply at any auto supply store. Just make sure it has the same thread as your spark plug.
Take out all the spark plugs and install the gauge in one cylinder. Crank the engine with the mags off for a few seconds and note the PSI, then do the same in the other cylinder.
On a new engine the readings will be between 100-120 PSI. Anything above 80 PSI is acceptable. Whatever the reading is, both cylinders should be about the same. Big PSI differences between cylinders could indicate stuck rings.
When you remove the exhaust manifold to examine the piston and rings, also look at the cylinder walls for scoring or aluminum deposits. You will notice two or three vertical scores on the cylinder wall directly opposite the exhaust port. Don't worry about those. That is where the ring gaps are located and they will leave marks on the cylinder wall.
Sorry about the radiator size mixup. Your rads are bigger than the rotax rads.
Bill.
Thank you said by: Michael Regan
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by bill martin » 12 years ago
Mike,
I misspoke. Take out ONE plug from each cylinder, not both.
Bill.
Thank you said by: Michael Regan
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by Michael Regan » 12 years ago
is there an easy way to do that with getting your head cut off by the prop? I thought of taking off the rad cap and using a mirror to look in and see if the coolant is flowing.
mike
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by Michael Regan » 12 years ago
Update:
Today I got a torch and a mirror and filmed the the coolant flow inside the radiator cap. The breather hose from the water pump is working great as you can see in the video, but I don't see a whole lot of coolant flowing throuh the radiator inlet pipe. You can take a look at the link below and see what you think.
http://www.youtube.com/watch?v=u8h-bjfF-QI&feature=youtu.be
Mike
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