captainron19
Seaman
- Joined
- Feb 10, 2012
- Messages
- 54
OK So here it goes...
1989 Robalo 2320, center console walk around (no cuddy cabin). It is 23' with an 8' Beam. Both engines are outboard Mariner V6 150's (1989) with a 25" shaft.
Both engines ran strong when I test drove the boat.... had it out with an full open throttle for almost 45 minutes continuous on the bay/inlet with a heavy chop and wind blowing 20-25 so the engines really got a good test. The first run i took it out on the river a week ago with a flat calm my starboard engine stalled twice (go figure). I thought it was just some air in the fuel line but the guy at Marina did a compression test for me and 5 cylinders were good (all 120-125) but the one cylinder had 0 compression. Me and the mechanic at my firehouse took the head cover off and found a blown piston.
I then took it to a marine shop specializing in Mercury and he gave it a look over and confirmed that the piston and cylinder were damaged to the point where it is un-repairable.
I went to a few other Marine shops to inquire on my options. One guy actually said that if I choose to go to a single engine (around 250 HP) I would actually increase my speed and fuel efficiency because the 2 engines on there now weigh almost 425 pounds each. Plus he did not recommend re-powering the bad engine since it is very old.
He also told me I could probably get almost $1500 for the good engine and anywhere from $300-$500 for the bad engine since people are always looking for parts. So I would plan on trading them or selling them to help offset any costs. I know I cannot afford a brand new outboard and I have seen a few good ones online and on ebay for the price range of about $4k -$5k.
The only other thing is..... if I choose to go with a single engine I was told it would have to have a 30" shaft. Right now my 2 Mariner Engines are 25" shafts but they are offset on the port and starboard sides so if I go with one engine it will be in the center of the transom where it is the tallest so the shaft would need to be 30"
Do I seem in the ballpark. I have heard from several people that I could go with a 225 - 250 HP single engine but one guy told me to check into the possibility that my boat is designed to have 2 engines and will not operate properly with a single engine. I know the max HP allowed for it is 300
I am not looking for imense speed..... I just want to get from point A to Point B with mostly operating in the river and bay with the ocassional trip just out of the inlets into the ocean.
Can anyone offer and input if I am on the right track?
1989 Robalo 2320, center console walk around (no cuddy cabin). It is 23' with an 8' Beam. Both engines are outboard Mariner V6 150's (1989) with a 25" shaft.
Both engines ran strong when I test drove the boat.... had it out with an full open throttle for almost 45 minutes continuous on the bay/inlet with a heavy chop and wind blowing 20-25 so the engines really got a good test. The first run i took it out on the river a week ago with a flat calm my starboard engine stalled twice (go figure). I thought it was just some air in the fuel line but the guy at Marina did a compression test for me and 5 cylinders were good (all 120-125) but the one cylinder had 0 compression. Me and the mechanic at my firehouse took the head cover off and found a blown piston.
I then took it to a marine shop specializing in Mercury and he gave it a look over and confirmed that the piston and cylinder were damaged to the point where it is un-repairable.
I went to a few other Marine shops to inquire on my options. One guy actually said that if I choose to go to a single engine (around 250 HP) I would actually increase my speed and fuel efficiency because the 2 engines on there now weigh almost 425 pounds each. Plus he did not recommend re-powering the bad engine since it is very old.
He also told me I could probably get almost $1500 for the good engine and anywhere from $300-$500 for the bad engine since people are always looking for parts. So I would plan on trading them or selling them to help offset any costs. I know I cannot afford a brand new outboard and I have seen a few good ones online and on ebay for the price range of about $4k -$5k.
The only other thing is..... if I choose to go with a single engine I was told it would have to have a 30" shaft. Right now my 2 Mariner Engines are 25" shafts but they are offset on the port and starboard sides so if I go with one engine it will be in the center of the transom where it is the tallest so the shaft would need to be 30"
Do I seem in the ballpark. I have heard from several people that I could go with a 225 - 250 HP single engine but one guy told me to check into the possibility that my boat is designed to have 2 engines and will not operate properly with a single engine. I know the max HP allowed for it is 300
I am not looking for imense speed..... I just want to get from point A to Point B with mostly operating in the river and bay with the ocassional trip just out of the inlets into the ocean.
Can anyone offer and input if I am on the right track?
