Well fellow C Dory owners. I’m new to large, fuel injected outboards and have learned a few things that I thought I'd pass on. Hopefully it will help someone as much as this site has helped me.
I recently purchased “Cappie”, a 1999 C Dory with a 2001 Yamaha 80HP. There were two problems…one I caught while purchasing it (and which the previous owner made good) and another which is evidently a common problem with Yamahas. BOTH had the SAME SYMPTOMS.
Firstly, the two fuel tank sending units were replaced in 2001 when the boat was converted from a two stroke. By the time I bought the boat, they were considerably rusted and had seriously contaminated the two fuel tanks; one much worse than the other. Small red particles could be seen in the fuel which lead to blocked jets. The previous owner seemed maticulomaticulous taken very good care of the boat but had no idea of the contamination.With one tank considerably worse than the other, I'm lead to believe that either that sending unit was faulty or that the tank with the worse unit was empty more of the time (exposing it to the air). Either way, the replacements are just metal also…and not stainless. I’m surprised they aren’t plastic. Actually I haven’t researched them extensively so maybe some of them are. I went with what was on hand for now.
The other clogged fuel problem regards the Yamaha 80. My mechanic (who has worked on Yamaha’s for the 25 years I’ve known him (I figured he’d be a good choice!) says that it’s common that the needles into the ventury get stuck by burrs on the seats. He said he had learned this the hard way on another boat a while back. Particularly when the motor is trailed, the float can bounce and jamb them into the seat causing them to stick…..today two cylindars were blocked. Socylindersrized air shot into the fuel line (or if your lucky just pumping the fuel bulb very hard) will unseat them but they must be removed and the venturies reamed. He says if the boat is left in the water often times the problem will not reveal itself until it's well along. He recommends running the engine for 1 – 2 mins with the fuel turned off before loading it on a trailer to keep the float well below the needles so they won't collide. He is presently reaming my seats.
Anyone else have this problem? Anyway, to all Yamaha owners out there, keep this in mind incase your Yamaha isn’t “running on all cylinders” so to speak....... and literally.
Dick
I recently purchased “Cappie”, a 1999 C Dory with a 2001 Yamaha 80HP. There were two problems…one I caught while purchasing it (and which the previous owner made good) and another which is evidently a common problem with Yamahas. BOTH had the SAME SYMPTOMS.
Firstly, the two fuel tank sending units were replaced in 2001 when the boat was converted from a two stroke. By the time I bought the boat, they were considerably rusted and had seriously contaminated the two fuel tanks; one much worse than the other. Small red particles could be seen in the fuel which lead to blocked jets. The previous owner seemed maticulomaticulous taken very good care of the boat but had no idea of the contamination.With one tank considerably worse than the other, I'm lead to believe that either that sending unit was faulty or that the tank with the worse unit was empty more of the time (exposing it to the air). Either way, the replacements are just metal also…and not stainless. I’m surprised they aren’t plastic. Actually I haven’t researched them extensively so maybe some of them are. I went with what was on hand for now.
The other clogged fuel problem regards the Yamaha 80. My mechanic (who has worked on Yamaha’s for the 25 years I’ve known him (I figured he’d be a good choice!) says that it’s common that the needles into the ventury get stuck by burrs on the seats. He said he had learned this the hard way on another boat a while back. Particularly when the motor is trailed, the float can bounce and jamb them into the seat causing them to stick…..today two cylindars were blocked. Socylindersrized air shot into the fuel line (or if your lucky just pumping the fuel bulb very hard) will unseat them but they must be removed and the venturies reamed. He says if the boat is left in the water often times the problem will not reveal itself until it's well along. He recommends running the engine for 1 – 2 mins with the fuel turned off before loading it on a trailer to keep the float well below the needles so they won't collide. He is presently reaming my seats.
Anyone else have this problem? Anyway, to all Yamaha owners out there, keep this in mind incase your Yamaha isn’t “running on all cylinders” so to speak....... and literally.
Dick