what is the motor

[crazyhunter]

i have what i think to be a 1990 mercury 40hp classic 4cylinder the # on it is 0d090369 can anybody tell me if it is infact the 40 classic

 

[steelespike]

Re: what is the motor

My limited info says the classic term first appears in 2000.But my info may be partial.

 

[crazyhunter]

Re: what is the motor

i know they had classics then i am just was trying to figure out some more info on this motor. its on a 89 procraft 16ft aluminum bass hunter i have been trying to find the specs for it also so i can see what would be the best prop for it.

 

[steelespike]

Re: what is the motor

My info says 1990 4cylinder 40 hp has a 2.00 gear ratio and is rated at a max rpm of 5500.
If you read "read this first" at the top of the prop page and tell us your prop size and present wot rpm and speed
We can help you make a decision.Speed by gps is best.

 

[crazyhunter]

Re: what is the motor

i wish i could find the rpms but my rpm gauge dosent work the only thing i know is that it will run about 30 with me and my gear (about 250pds)

 

[steelespike]

Re: what is the motor

Unfortunately without rpm there is no way to know if the motor is within its operating range.
or if your setup is working.
Sometimes tach problems are just bad connections.Some tachs have a switch on the back.Make note of the setting and operate the switch a few times to clean the contacts.
A tiny tach is reasonable easy to install and will work on any gas engine.
I can tell you that "about" 30 is reasonable for a 40 but not knowing if the boat is 100lbs or 1000 lbs that info doesn't mean much.
Did you read "read this first" at the top of the prop page.

 

[steelespike]

Re: what is the motor

Meant to say read "read this first" at the top of the prop page.

 

[Thalasso]

Re: what is the motor

i have what i think to be a 1990 mercury 40hp classic 4cylinder the # on it is 0d090369 can anybody tell me if it is infact the 40 classic

I think the op wants this info. Not speed.

 

[steelespike]

Re: what is the motor

I think the op wants this info. Not speed.

I gave him the info but it seems he wants to check or improve his performamce.
Said he wished he knew rpm and then gives speed and weight of him and gear.
Thats why a suggest he read "read this first" That would at least get us the prop size,speed and what boat
still not enough but might tell if the setup is close to what it should be.