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bonach
11-28-2008, 10:19 AM
Guys I have a 1990 F18 and love the boat. I don't have trim tabs and the engine is a 2005 suzuki 4 stroke. At cruise I can get around 18-19 knots 4500 rpm. At full I get around 25-28 kts at 6100 rpm. Is this normal for this boat or should I be getting a little more speed. This is with 2 guys on the boat and 30 gals. of gas. The prop is not stainless. Also she is a dog getting out of the water with a full load. I feel it is a prop issue but not sure.

cutwater
11-28-2008, 11:07 AM
Guys I have a 1990 F18 and love the boat. I don't have trim tabs and the engine is a 2005 suzuki 4 stroke. At cruise I can get around 18-19 knots 4500 rpm. At full I get around 25-28 kts at 6100 rpm. Is this normal for this boat or should I be getting a little more speed. This is with 2 guys on the boat and 30 gals. of gas. The prop is not stainless. Also she is a dog getting out of the water with a full load. I feel it is a prop issue but not sure.

Prop pitch? Engine hp?

BigGrizzly
11-28-2008, 11:33 AM
I got a idea, give us an idea of the kind of prop that is on it.

bonach
11-30-2008, 02:47 PM
It is a 2005 140 hp 4 stroke suzuki and the prop pitch is 14X17. Thanks guys.

BigGrizzly
12-01-2008, 11:52 AM
I think a Turbo if top speed is important, maybe even a good 4 blade if rough water fishing is a concern. Similar pitch.

bonach
12-02-2008, 07:08 PM
Thanks BigG I'll let you know how I make out.