Bit of knowledge please

[Mavric]

My question as stupid as it may sound ? is do outboards Rev high in reverse gear ? because if I put it in forward i have to gradually increase the power to full throttle but when i put it into reverse it seems to rev higher without giving it to much throttle ?? please don't laugh as i don't know if this is the normal way outboards operate cheers steve.

 

[rafiki_]

My question as stupid as it may sound �� is do outboards Rev high in reverse gear ? because if I put it in forward i have to gradually increase the power to full throttle but when i put it into reverse it seems to rev higher without giving it to much throttle ?? please don't laugh as i don't know if this is the normal way outboards operate cheers steve.

On my outboard, I don't think the throttle knows what gear is selected, either fwd or reverse, so will pull the same revs for the same throttle opening. This is only a basic 6hp Yammy. On the clever electronic outboards, I expect the engine controller will monitor gear as well as everything else. What motor do you have?

 

[Mavric]

Mariner 50 hp 4 cylinder 2 stroke 1984 i think , i only have to select reverse on my throttle control and it revs high , select cowards and to have to move the throttle control to get high revs ive been told it's the way they work because of the prop but I'm no expert so posted here for someone to clarify for me

 

[Spi D]

On single lever remote control boxes (all sorts) you have neutral in 'the middle'. When you move the lever either forward or backwards it moves the gear cable respectively (to be done as a quick move to avoid grinding gears). After engaging gears the box start to pull the throttle cable and add rpm/power. Same procedure in both directions although some boxes restrict lever movement in reverse to avoid mishaps.

Cables' adjustment seems to be your problem as it apparantly adds throttle too early when in reverse.
Plenty of hints, guides and videos on adjustment on the web

 

[rwilson]

I think prop design has more to do with the apparent increase in revs at low throttle openings in reverse. The prop does not bite in reverse as it does in forward so your increased revs are likely a result of cavitation.

 

[Aardee]

I think prop design has more to do with the apparent increase in revs at low throttle openings in reverse. The prop does not bite in reverse as it does in forward so your increased revs are likely a result of cavitation.

I was just about to reply with the same - There's less drive in reverse (as the prop is designed to push the boat forward) therefore less resistance, which means the revs build a lot quicker.

 

[Mavric]

Thanks for the replies , this happens not in the water but running on muffs it just seems that when i put it in reverse it engages and i only have to apply a very small amount of throttle to get a higher rev than if i did it in forward im sure my cables are set right as gears select correctly and throttle response seems good .