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Old 30 June 2007, 16:57   #11
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Hi Mark,

Could be interested, what rib do you currently have your 90 on? I am looking for a newer more economical engine for my Ribtec 585, currently have an old Mariner 135hp 2-stroke that's killing me with fuel bills (~1.3litres per mile!). What kind of economy and performance are you getting from it?

Cheers!
Neil
How could you go from a 135 to a 90?
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Old 01 July 2007, 03:30   #12
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bigNeil, without knowing what you use the boat for and speaking from my own perspective I would have thought If you run a 90 on the ribcraft you would probably find you are WOT the whole time which would mean fuel consupmption not dissimilar to what you ar getting at the moment.

I would have thought a fourstroke similar in size to what you have at the moment would be a better bet?

Chris
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Old 01 July 2007, 04:42   #13
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Thanks for your thoughts Chris. Don't want to hijack the thread.

The current 135 is too much for the boat. At 43 knots WOT 5300rpm, the boat feels very skittish even 4 up. Don't do waterskiing or anything that needs that amount of grunt.

I mainly use the boat for low speed sailing and marine wildlife photography, and cruising the west coast of Scotland. Hence would be looking for an ultra reliable, economic, second hand (the hull is almost 20 years old, silly to put a new one on for poss resale value) 4 stroke that can cruise at about 25 knots 3-up, and is happy to idle all day.

The transom is the weak point, a previous repair along the top edge is failing again, so plan is to redo the transom over the winter and slap a not too heavy 4 stroke on (also, transom is quite low anyway, so lighter engine = better).
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Old 01 July 2007, 06:17   #14
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i can guarantee that the honda 90 will troll all day and night and not miss a heart beat, we would use ours on the river thames for upto 8 hours a day and never ever had an issue. nice and quite too for that stuff.
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Old 01 July 2007, 06:50   #15
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bigNeil, without knowing what you use the boat for and speaking from my own perspective I would have thought If you run a 90 on the ribcraft you would probably find you are WOT the whole time which would mean fuel consupmption not dissimilar to what you ar getting at the moment.

I would have thought a fourstroke similar in size to what you have at the moment would be a better bet?

Chris
Totally, or perhaps a 115 Suzook. With a 90 on there you're in danger of ending up with a bit of a pup with very little re-sale value.
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Old 01 July 2007, 07:26   #16
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Totally, or perhaps a 115 Suzook. With a 90 on there you're in danger of ending up with a bit of a pup with very little re-sale value.
Yep, you may be right, but there seems like quite a few Honda 90s around at the moment, and they have a good reputation up here with the fish farmers!
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Old 01 July 2007, 08:07   #17
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Totally, or perhaps a 115 Suzook. With a 90 on there you're in danger of ending up with a bit of a pup with very little re-sale value.
Mollers! - Don't those Ribtecs go well with 90hp down your way?

With due respect to BigNeil, the boat sounds like it's getting a bit tired, so resale value probably isn't that high, in any case.
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Old 01 July 2007, 09:54   #18
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Mollers! - Don't those Ribtecs go well with 90hp down your way?

With due respect to BigNeil, the boat sounds like it's getting a bit tired, so resale value probably isn't that high, in any case.
BigNeil
I bought my Ribtec 585 with a mariner 75HP on the back (Coastguard Spec) and it went fine, I think the Honda 90 would be ideal for what you want.

My transom is Max rated to 120 so as you say your current 135 likely to be too big anyway.
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Old 01 July 2007, 11:30   #19
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BigNeil
I bought my Ribtec 585 with a mariner 75HP on the back (Coastguard Spec) and it went fine, I think the Honda 90 would be ideal for what you want.

My transom is Max rated to 120 so as you say your current 135 likely to be too big anyway.
Thanks John, yep the transom's had a hard life with the grunt and 185kgs of the Mariner. I think a 90 will be a good compromise.

Out of interest, what was the top speed of your 585/75 combo?
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Old 01 July 2007, 11:50   #20
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Thanks John, yep the transom's had a hard life with the grunt and 185kgs of the Mariner. I think a 90 will be a good compromise.

Out of interest, what was the top speed of your 585/75 combo?
I would guess it was about 33-35 knots, I get 39+ on the current set up
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