I've done a little boating in the past (rented or borrowed) but now I own one. It's a Larson SEi 190 w/3.0L inline Mercruiser Alpha 1 Gen 2 in what looks to be very good condition (opinions?).
There are a few things I'm, curious about.
Where is the tube for the speedometer, it seems to be reading low and I want to make sure it?s not obstructed. I've already checked the hose from the gauge back to the drive. And yes I know it?s not a very accurate meter.
The WOT is 4300rpm but the specs say 4400-4800 and I'd like to get that little extra out of it (I'm thinking of swapping it out for a 4.3 in the fall). So I thought I'd tune it up and clean/adjust the carb. Back around the mid 80s I was a Chevy Certified Technician so I know a bit about this engine and carb. But frankly I've forgotten what, if anything, I have to do to the HEI when I set the timing. Could someone remind me?
Could a drop of 500rpm be caused by the prop alone? It's a 14.5x19, stock for this boat, and it has some corrosion and nicks. I'm getting a new one anyway but was wondering.
What would happen if I went with a 21 prop? It has plenty of off the line power now, I'm just looking for a little more speed.
Does aluminum or stainless really make any difference?
And one final question for when I swap the engine in the fall. I'll be able to see this after I pull the 4cyl, but I'd like to know in advance. What kind of fastener is used in the hull for the engine mount? The mounting boss is there for the 6cyl but no imbedded hardware, what kind of nut is used?
Thanks in advance
RC
There are a few things I'm, curious about.
Where is the tube for the speedometer, it seems to be reading low and I want to make sure it?s not obstructed. I've already checked the hose from the gauge back to the drive. And yes I know it?s not a very accurate meter.
The WOT is 4300rpm but the specs say 4400-4800 and I'd like to get that little extra out of it (I'm thinking of swapping it out for a 4.3 in the fall). So I thought I'd tune it up and clean/adjust the carb. Back around the mid 80s I was a Chevy Certified Technician so I know a bit about this engine and carb. But frankly I've forgotten what, if anything, I have to do to the HEI when I set the timing. Could someone remind me?
Could a drop of 500rpm be caused by the prop alone? It's a 14.5x19, stock for this boat, and it has some corrosion and nicks. I'm getting a new one anyway but was wondering.
What would happen if I went with a 21 prop? It has plenty of off the line power now, I'm just looking for a little more speed.
Does aluminum or stainless really make any difference?
And one final question for when I swap the engine in the fall. I'll be able to see this after I pull the 4cyl, but I'd like to know in advance. What kind of fastener is used in the hull for the engine mount? The mounting boss is there for the 6cyl but no imbedded hardware, what kind of nut is used?
Thanks in advance
RC