Search found 2295 matches

by chris moody
25 Jul 2019, 22:04
Forum: Outboards
Topic: Mercury 20HP Efi - Smoke on the water
Replies: 48
Views: 3129
Great Britain

Re: Mercury 20HP Efi - Smoke on the water

The plug was pulled by me the the organiser harrison because 48 hours before the original organised test date nobody was prepared to put their engine on the test boat I had pulled in loads of favours to arrange, despite several people coming along having suitable outboards . I was very embarrassed b...
by chris moody
25 Jul 2019, 17:07
Forum: Outboards
Topic: Mercury 20HP Efi - Smoke on the water
Replies: 48
Views: 3129
Great Britain

Re: Mercury 20HP Efi - Smoke on the water

We have already tested the T38 and Volaire head to head last Monday @harrison
by chris moody
24 Jul 2019, 15:11
Forum: Outboards
Topic: Mercury 20HP Efi - Smoke on the water
Replies: 48
Views: 3129
Great Britain

Re: Mercury 20HP Efi - Smoke on the water

Have you checked the oil level with the dipstick?
by chris moody
23 Jul 2019, 17:42
Forum: My Boat / My Build...
Topic: Takacat 3.4m LX - Tiny Tigga
Replies: 74
Views: 7898
Great Britain

Re: Takacat 3.4m LX - Tiny Tigga

Knox when I did my online research it seemed that cupping the prop had a better chance of success than adding a permatrim. And the cupping in my case worked perfectly. I also don’t like the extra drag from a hydrofoil (with 6hp you are going to need all 6hp and minimum drag). But if the permatrim i...
by chris moody
23 Jul 2019, 15:02
Forum: My Boat / My Build...
Topic: Takacat 3.4m LX - Tiny Tigga
Replies: 74
Views: 7898
Great Britain

Re: Takacat 3.4m LX - Tiny Tigga

Do you have a Takacat @Knox ? If so which model of Takacat, and which outboard?

Knox wrote:
23 Jul 2019, 10:12


Hi Chris,

have you been out with the new prop? How does it work?
Do you have Permatrim Hydrofoils on your engine?

Mark

PS: Please excuse my poor english ;-)
by chris moody
23 Jul 2019, 14:33
Forum: My Boat / My Build...
Topic: Takacat 3.4m LX - Tiny Tigga
Replies: 74
Views: 7898
Great Britain

Re: Takacat 3.4m LX - Tiny Tigga

A very short video clip while out in the Takacat yesterday.

by chris moody
23 Jul 2019, 13:39
Forum: My Boat / My Build...
Topic: Takacat 3.4m LX - Tiny Tigga
Replies: 74
Views: 7898
Great Britain

Re: Takacat 3.4m LX - Tiny Tigga

Hi Mark

The new smaller pitch, but cupped to bring the pitch back up, propeller has cured the ventilation.

I didn’t want to go down the route of hydrofoils, so no permatrim fitted.
by chris moody
21 Jul 2019, 15:19
Forum: Inflatable Boat Help, Advice, Discussions and General Boating Banter
Topic: rpm range
Replies: 8
Views: 725
Great Britain

Re: rpm range

The engine doesn’t need to be working in that rev range, it just needs to be between those two numbers when at wide open throttle.
by chris moody
21 Jul 2019, 14:59
Forum: Inflatable Boat Help, Advice, Discussions and General Boating Banter
Topic: rpm range
Replies: 8
Views: 725
Great Britain

Re: rpm range

A rev counter isn’t needed after you have done the wide open throttle tests and selected the optimum propeller. Just use the eBay one for prop testing, then remove it. If you had gears on an outboard a tachometer would be useful, but as we all only have one gear it’s an unnecessary bit of kit. Water...
by chris moody
21 Jul 2019, 13:45
Forum: Inflatable Boat Help, Advice, Discussions and General Boating Banter
Topic: rpm range
Replies: 8
Views: 725
Great Britain

Re: rpm range

It means you should select a propeller of a diameter and pitch than puts the engine inside this rev range when running at wide open throttle. If the engine cannot make 5250 rpm you are over propped and the engine will be labouring. If you exceed 6250 you are under propped and not loading the engine ...

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