How fast should my boat go

[smokeyblaze]

1978 mercury 90 hp inline six two-stroke on a 17" FiberGlass Richline Bass Boat. Anyone have a guess at what the top speed should be close to?

 

[dfrants]

Re: How fast should my boat go

Depending on the weight of your boat, the mercs compression, and the prop you have...I'd guess in the low 40's.

 

[mthieme]

Re: How fast should my boat go

That's close to my guess which would have been 40-ish.

 

[smokeyblaze]

Re: How fast should my boat go

Dang I expected a little bit more out of a 90 horse. Well last time I was out i was hitting 30 mph according to my gps and that was with a bad fuel leak at the fuel pump so we'll see what it gets up to next time

 

[boat1010]

Re: How fast should my boat go

There are a lot of factors that determin your speed. Just because you have a 90 for a motor, if you have a low pitch prop it will effect teh top-end speed. also the trim will effect the top speed. You never mentioned what rpm you were running. WOT? Good luck.