2000 130 Johnson - Mid Range RPM

[wothersr1]

Help. Purchased new 2000 Johnson 130 (V4 90 Degree) May 2002 from Roy Lewis Enterprises in Toronto, Ontario. Boat is mounted on a 1989 17' Doral Spirit. Motor replace a 1989 120 Johnson.<br /><br />Motor will not hold rpm between 3100 and 3900 RPM. Motor operates properly to 3100 rpm and holds. Speed is 21 mph. If you advance the throttle slightly the motor shoots up to 3900 rpm and holds. Speed is 29 mph. If you slightly decrease the throttle, the motor reduces to 3100 rpm and holds. <br /><br />The dealer who I purchased the motor from refuses to take the time to due an in water test. He believes the he can remove some of the problem by adjusting the linkage but that the problem is probably a characteristic of the motor.<br /><br />Talked to the OMC helpline. They suggested that I take the motor to another dealer and start with the electrics 1st and carbs 2nd. <br /><br />I talked to an ex. OMC dealer who suggests that the problem may be with the electronic spark advance in the power pack (Quick Start) used for cold starting the motor. He thinks it may be kicking in the mid range.<br /><br />I had this problem once before on an 1988 70 Evinrude. When I got the motor back from the dealer, the powerhead blew with the 1st hour of operation. To say I am gun shy would be an understatement. Most of the dealers in this area are not on water, do not have the equipment to test out of the water and have difficulty in solving problems like this. Basically they replace parts. tell you to try it and bring it back if not working properly. <br /><br />My hope is that somebody who reads this has had a similar experience with a V4 Evinrude or Johnson and can share their solution with me.<br /><br />Thanks for your help,<br /><br />Rick

 

[Trevor]

Re: 2000 130 Johnson - Mid Range RPM

was the problem you had with your outher motor on the same boat? because this sounds like it is a Hull caritoristic I sold doral for many years and these boats have an extreamliy fast hull under then there new 19' witha 2bbl 4.3 does 50+ mph <br />I think that the boat is breaking free and thus the resitance on the motor is less causing it to rise in revs. your old motor probubly blew due to the dealer leaning out the motor to stop this but went to far. i would rule out the motor if you had the same troubles with the outher motor on the same boat. <br />Good luck Trev

 

[wothersr1]

Re: 2000 130 Johnson - Mid Range RPM

Trevour,<br /><br />Thank you for your response. The previous motor, 1989 120 Johnson did not have this problem. It operated properly through the entire rpm range.<br /><br />Thanks,<br /><br />Rick

 

[Trevor]

Re: 2000 130 Johnson - Mid Range RPM

I would start looking at the timing advace if it is sticky it will cause this as well.

 

[Joe Reeves]

Re: 2000 130 Johnson - Mid Range RPM

Wothersr1.... Any time I've encountered a problem such as having a drastic drop or increase of rpms when making a extremely small adjustment of the throttle, it has always been due to a misadjustment of the linkages between the timer base assy and the carburetors (synchronization). This adjustment is beyond my capabilities to explain thoroughly and I would suggest that you obtain the specific service manual via your dealership, or go to the bottom of this page to order from this site if they have access to the specific manual.<br /><br />However, I'll try to explain some areas of it as listed below.<br /><br />You can examine the cam and carb roller travel yourself. Remove the hood, remove the s/plugs. If you have a throttle control whereas you can give the engine full throttle (Not Running) without putting the engine into gear, fine. If not, have someone spin the prop while you engage it into gear (align the clutch dog and gear lobes) so that you can obtain the full throttle position.<br /><br />Now, slowly move the throttle from the idle position through to the full throttle position and back. Closely observe the movement of the timer base under the flywheel and the action of the cam against the carburetor roller. The full movement should be smooth all of the way. If you observe any sticking, jerking, anything other than a smooth movement anywhere, find out why. At full throttle, check to see if the throttle butterflies are indeed wide open.<br /><br />There will be a scribe mark on the cam that rides against the carburetor roller. The carb roller should be adjusted so that the scribe mark engages the carb roller when the roller is dead center with that mark. The throttle butterfly(s) should start to open at that point, not before or after. Examine the cam and roller for anything out of the ordinary (lopsided roller, burr on the cam, etc).<br /><br />Also examine the carburetor butterflies. They should all open and close at the same time. Have the carb roller away from the cam, then check the linkages between the carb buterflies to make sure they are adjusted properly (all butterflies closed). If that linkage is wrong (one butterfly even so slightly open), the problem you describe is very likely to take place (very erratic).<br /><br />Before going into the above checks, always check the compression and ignition (spark) first. Compression should be in the range of 100+ psi and even on all cylinders. With the s/plugs removed, spark should jump a 7/16" gap on all cylinders with a strong blue flame. Keep us informed.

 

[wothersr1]

Re: 2000 130 Johnson - Mid Range RPM

Joe,<br /><br />Thank you very much for your very detailed reply. I plan to tackle the problem when I pull the boat from storage in April and will let you know how we made out. <br /><br />Thanks again,<br /><br />Rick