Ok here is the story behind this boat. It is a 1986 Bayliner Capri that had a Volvo 305 in it Cast ID 551. It ran fine last summer but it wasn't winterized correctly and cracked the block. I put in a new re-manufactured 350 to get a little more power as well as a new water pump, plugs and wires.
After the motor was installed I took it out for its fist run. It started up great, sat there and idled just fine. got it up to about 25-30 mph (half throttle) and anything beyond that point it just bogs down like it is getting ready to shut off. It starts backfiring and just grumbling like crazy. If you back down to about half throttle everything is fine. I would love to tell you about how many RPM's it starts to do it but to be honest with you my tachometer does not work so I don't know.
Here is another thing about the installation of the motor that you should know as well. It might make a difference and it might not but I thought I would throw it out there anyways. I was told that the new block did not have a place on it for the old fuel pump and that I needed to upgrade to a electronic one. I wanted to put a marine one on but he talked me into putting an automotive fuel pump on it (35 gal/hr). I was thinking that this was the problem.
After the first failed attempt to have some fun I took it back up to the repair shop for them to take another look at it. He reassured me that the fuel pump should be fine since it was pretty big. He took the carb off the manifold to see if there were any stuck floats and he said everything looked fine. He then proceeded to tell me that the carb had a fuel filter on it and so did the new fuel pump so he took one of them off saying that you didn't need two and that might be the problem.
I am going to get the boat back tomorrow and drop it in the water to see if anything has change and i'll let you guys know then.
I have a suspicion that he doesn't know what is wrong with it and is trying every little small step to try and figure it out. SUMMERS ALMOST OVER!!!
My question to you guys is have you ever had this problem or help solve a problem like this and can you help me out so if this next step doesn't work that I can have try the suggestions you mention here.
Anything would be great and I hope I did a well enough job at describing the boat and what Ihad done to it.
Thanks in advance!
Darin
After the motor was installed I took it out for its fist run. It started up great, sat there and idled just fine. got it up to about 25-30 mph (half throttle) and anything beyond that point it just bogs down like it is getting ready to shut off. It starts backfiring and just grumbling like crazy. If you back down to about half throttle everything is fine. I would love to tell you about how many RPM's it starts to do it but to be honest with you my tachometer does not work so I don't know.
Here is another thing about the installation of the motor that you should know as well. It might make a difference and it might not but I thought I would throw it out there anyways. I was told that the new block did not have a place on it for the old fuel pump and that I needed to upgrade to a electronic one. I wanted to put a marine one on but he talked me into putting an automotive fuel pump on it (35 gal/hr). I was thinking that this was the problem.
After the first failed attempt to have some fun I took it back up to the repair shop for them to take another look at it. He reassured me that the fuel pump should be fine since it was pretty big. He took the carb off the manifold to see if there were any stuck floats and he said everything looked fine. He then proceeded to tell me that the carb had a fuel filter on it and so did the new fuel pump so he took one of them off saying that you didn't need two and that might be the problem.
I am going to get the boat back tomorrow and drop it in the water to see if anything has change and i'll let you guys know then.
I have a suspicion that he doesn't know what is wrong with it and is trying every little small step to try and figure it out. SUMMERS ALMOST OVER!!!
My question to you guys is have you ever had this problem or help solve a problem like this and can you help me out so if this next step doesn't work that I can have try the suggestions you mention here.
Anything would be great and I hope I did a well enough job at describing the boat and what Ihad done to it.
Thanks in advance!
Darin
