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So, a couple people asked what the update was, so figured to let others know.
Pulled the plugs on both engines.
Engine #1 is a 2003 TXRB F225 Yamaha with about 1100 hours on it. The plugs all drew a 160-170 compression test. I did not do a leak by test as I do not have that tool, but, seemed to be fine. A couple plugs have some buildup, but I would expect that if the person doing them did not use a feeler guage and set them right and/or if the engines had not been properly serviced in a while.
Engine #2 is a 2004 TXRC F225 Yamaha with about 350-ish hours and all the cylinders tested 160-170 except cylinder #3 which tested a 90 psi.
Now, I am not going to pull the engines apart when they are running fine, for a single cylinder. The plug appeared fine, in fact the only plug that had an issue was cylinder #5 had more buildup than I would expect, but if there is blow-by, that may be expected, so, will keep an eye on it. That being said, the engines are fine, for the most part. "IF" I was going to rebuild that engine, I would not ... not rebuild the one pushing 1200 hours. So, I will do a full service and get the rest of the systems up to par and hope it makes it through this season. Then, I will debate removing the engines and rebuilding them in the shop during cooler weather.
I have a few 'feelers' out to get a Yamaha mechanic, local, that I can trust, to check over my work once it is done, which should be in a week or so, once all the parts arrive. I am making videos of it all and I have my mechanical log of all the findings and what I am replacing with part numbers etc, for "the next person" that wants to try this. The key is, yes, bots.net has great videos and, thankfully, it is with the exact same engine and year... but most see that and think "I cannot do that" and maybe by seeing a non-professional, they will feel a little better doing it.
Now, after talking to my wife, if the engines have an issue.. then, at that time, we will debate just adding a re-power. If we are going to drop 5k per engine, why not just get a couple later (new but not 2020) yamaha engines and re-power... it would be less than her last car and is an option.
And, while I "could" rebuild the engines, I may choose to let someone with a lot more experience handle it and/or get a warranty.
All a topic for another time. Will see how the engines look after I service them and then run it by a tech.
R
Pulled the plugs on both engines.
Engine #1 is a 2003 TXRB F225 Yamaha with about 1100 hours on it. The plugs all drew a 160-170 compression test. I did not do a leak by test as I do not have that tool, but, seemed to be fine. A couple plugs have some buildup, but I would expect that if the person doing them did not use a feeler guage and set them right and/or if the engines had not been properly serviced in a while.
Engine #2 is a 2004 TXRC F225 Yamaha with about 350-ish hours and all the cylinders tested 160-170 except cylinder #3 which tested a 90 psi.
Now, I am not going to pull the engines apart when they are running fine, for a single cylinder. The plug appeared fine, in fact the only plug that had an issue was cylinder #5 had more buildup than I would expect, but if there is blow-by, that may be expected, so, will keep an eye on it. That being said, the engines are fine, for the most part. "IF" I was going to rebuild that engine, I would not ... not rebuild the one pushing 1200 hours. So, I will do a full service and get the rest of the systems up to par and hope it makes it through this season. Then, I will debate removing the engines and rebuilding them in the shop during cooler weather.
I have a few 'feelers' out to get a Yamaha mechanic, local, that I can trust, to check over my work once it is done, which should be in a week or so, once all the parts arrive. I am making videos of it all and I have my mechanical log of all the findings and what I am replacing with part numbers etc, for "the next person" that wants to try this. The key is, yes, bots.net has great videos and, thankfully, it is with the exact same engine and year... but most see that and think "I cannot do that" and maybe by seeing a non-professional, they will feel a little better doing it.
Now, after talking to my wife, if the engines have an issue.. then, at that time, we will debate just adding a re-power. If we are going to drop 5k per engine, why not just get a couple later (new but not 2020) yamaha engines and re-power... it would be less than her last car and is an option.
And, while I "could" rebuild the engines, I may choose to let someone with a lot more experience handle it and/or get a warranty.
All a topic for another time. Will see how the engines look after I service them and then run it by a tech.
R