We had some performance issues with the 02 Utopia 185 we bought last summer that were all delt with by a complete tune up of, new spark plugs, new gas, port cylinder head temp sensor, water seperator and fuel filter. With the engine running properly, the feel of all 240 HP was more than I expected and the noticeable DROP in fuel consumption was welcome side benefit as I no longer needed anywhere close to full throttle to maintain a comfortable cruise speed.
Forward to this year and all was well until late June. I was losing top end - nothing over 4500 rpm and needed full throttle just to come up on plane. I tested my port side cylinder head temp sensor and from the Merc book I had - and incorrectly failed my sensor. (Found a small amount of water getting past the expansion chamber gasket while checking the engine running in the driveway at the same time, you know that gut feeling???).
Installed a new expansion chamber gasket and a temp sensor and full performance surged back intermittently for about 2-3 minutes on the next river trial. And then full throttle would not even get me on plane. Barely any power anywhere depsite where the throttle was.
Cylinder compression checks came back between 124 - 128psi
Dealer had a different Mercury Jet book than mine and said temp sensor ohms reading was fine.
Checked the TPS as that was the next item in the book and it initially looked good.
So I headed to the dealer who has a Digital Diagnostic Terminal and it ran through its software and throttle position sensor failed. Oh my goodness, $730 Canadian or $ 601.75 at the American dealer for something that looks like it should be, maybe $40 ... at the high end!
I saw them on ebay (new in package for a bit less but then overnight shipping & brokerage to Ontario, possible warranty issues), so gave my dealer the go ahead. Part has to come from USA warehouse, 1 week for delivery to my dealer.
Won't print what my dear wife said.
Mike.
Forward to this year and all was well until late June. I was losing top end - nothing over 4500 rpm and needed full throttle just to come up on plane. I tested my port side cylinder head temp sensor and from the Merc book I had - and incorrectly failed my sensor. (Found a small amount of water getting past the expansion chamber gasket while checking the engine running in the driveway at the same time, you know that gut feeling???).
Installed a new expansion chamber gasket and a temp sensor and full performance surged back intermittently for about 2-3 minutes on the next river trial. And then full throttle would not even get me on plane. Barely any power anywhere depsite where the throttle was.
Cylinder compression checks came back between 124 - 128psi
Dealer had a different Mercury Jet book than mine and said temp sensor ohms reading was fine.
Checked the TPS as that was the next item in the book and it initially looked good.
So I headed to the dealer who has a Digital Diagnostic Terminal and it ran through its software and throttle position sensor failed. Oh my goodness, $730 Canadian or $ 601.75 at the American dealer for something that looks like it should be, maybe $40 ... at the high end!
I saw them on ebay (new in package for a bit less but then overnight shipping & brokerage to Ontario, possible warranty issues), so gave my dealer the go ahead. Part has to come from USA warehouse, 1 week for delivery to my dealer.
Won't print what my dear wife said.
Mike.
